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Crabtree Mine (Big Crabtree Emerald Mine), Spruce Pine, Spruce Pine Mining District, Mitchell Co., North Carolina, USAi
Regional Level Types
Crabtree Mine (Big Crabtree Emerald Mine)Mine
Spruce Pine- not defined -
Spruce Pine Mining DistrictMining District
Mitchell Co.County
North CarolinaState
USACountry

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Key
Latitude & Longitude (WGS84):
35° 52' 29'' North , 82° 7' 12'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Spruce Pine2,134 (2017)6.7km
Bakersville452 (2017)16.0km
Burnsville1,660 (2017)17.0km
Marion7,861 (2017)23.4km
Crossnore192 (2017)23.7km


An emerald mine located about 6.2 kilometers (4 miles) SW of Spruce Pine.

The Crabtree pegmatite is a beryl (emerald, green beryl, aquamarine and yellow beryl) and tourmaline-bearing granitic pegmatite. Emerald and green beryl occurs in the biotite and chlorite selvage and the pegmatite margin. Aquamarine and yellow beryl occurs in the pegmatite core. Green and purple fluorite, white mica, almandine-spessartine garnet and xenotime are accessory minerals. It has been sporadically mined for gem-quality beryl from 1894 to the late 1970’s and has produced a number of good quality emeralds, one of which was 70 carats. The pegmatite intrudes at the boundary between garnet-titanite-zoisite bearing hornblende-plagioclase gneiss (blastomylonite) and plagioclase-quartz-biotite-white mica porphyroclastic gneiss. (Source: Tappen, et al, 2006).

Mining operations at the Crabtree Emerald Mine began in July of 1894 by J.L. Rorison and D.A. Bowman. The emeralds at the mine occur in a pegmatite vein approximately five feet wide with well-defined walls. Mineral rights to the Crabtree were acquired by the American Gem and Pearl Company of New York in 1905. The company operated the mine several years and marketed the rock as "emerald matrix". The material was cut en cabochon. Although most of the gem material was sold as "emerald matrix", early mining operations did produce fine clear gems suitable for faceting. The deeper the shaft was sunk, the larger the emeralds that were found, many up to one inch in diameter and one inch long. The American Gem and Pearl Co. discontinued operations in 1908. The mineral rights to the property were then purchased by Edward Fortner and J.P. Grindstaff. In recent years the Crabtree was mined commercially from 1968 to 1974 during which time, fee collecting was allowed on the dumps. In the 1980's the mine was closed for some time. The mineral rights were purchased in 1984 by the partnership of Ted Ledford, Bert Roper and Dal Duppenthaler, the new owners actively mined the site. In 1985 the mine was called "Gem Haven" and public collecting was allowed on the dumps at the mine. As of 1994 the mine was closed and has set idle for many years with the occasional collector visiting the site. In 2003, Bert Roper and Dal Duppenthaler acquired sole ownership of the mine. As of 2009, in an agreement with the Mountain Area Gem and Mineral Association, the mine has been reopened to the public under the management of the M.A.G.M.A. Club. (Source: Alex Glover, M.A.G.M.A., 2009, pers. comm.to Harjo Neutkens).

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


19 valid minerals. 1 (TL) - type locality of valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
Albite
Formula: Na(AlSi3O8)
Reference: No reference listed
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Swanson,Samuel E.and Veal,William B.(2010) Mineralogy and petrogenesis of pegmatites in the Spruce Pine District,North Carolina,USA;Journal of Geosciences ,Vol.55,pp.27-42
Almandine
Formula: Fe2+3Al2(SiO4)3
Description: Garnets are Almandine - Spessertine with Grossular rims.
Reference: Swanson,Samuel E. and Veal,William B.(2010)Mineralogy and petrogenesis of pegmatites in the Spruce Pine District,North Carolina,USA:Journal of Geocsiences,Vol.55,pp.27-42
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
Beryl
Formula: Be3Al2(Si6O18)
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: Streeter,Michael,2003, A Rockhounding Guide to North Carolinas Blue Ridge Mountains; American Mineralogist,Vol.18,No.4,April,1933 pp 148-159
Beryl var: Emerald
Formula: Be3Al2(Si6O18)
Reference: Rocks & Min.:60:92.; American Mineralogist,Vol.18,No.4,April,1933 pp 148-159
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Reference: Streeter,Michael.,2003, A Rockhounding Guide to North Carolinas Blue Ridge Mountains
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Reference: Swanson,Samuel E. and Veal,William B.(2010)Mineralogy and petrogenesis of pegmatites in the Spruce Pine District,North Carolina,USA:Journal of Geosciences,Vol,55,pp.27-42
'Chlorite Group'
Reference: Tappen,Christine.,Smith S.Michael and Dockal A. James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District Mitchell County ,North Carolina:Proceedings of the 42nd Forumon the Geology of Industrial Minerals at Asheville,North Carolina,Information Circular 34,NCGS
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
'Dravite-Schorl Series'
Reference: Tappen,Christine.,Smith S.Michael and Dockal A. James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District Mitchell County ,North Carolina:Proceedings of the 42nd Forumon the Geology of Industrial Minerals at Asheville,North Carolina,Information Circular 34,NCGS
Fluor-dravite (TL)
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Type Locality:
Habit: Anhedral, up to a few mm in size,occurs as isolated grains.
Colour: Blackish-Brown
Fluorescence: None in S.W or L.W light
Description: Associated with plagioclase,K-feldspar,Quartz,Beryl,Muscovite,Garnet group,Biotite, and Fluorite.
Reference: Clark, C.M., Hawthorne, F.C., Ottolini, L. (2011): Fluor-dravite, NaMg3Al6Si6O18(BO3)3(OH)3F, a new mineral of the tourmaline group from the Crabtree emerald mine, Mitchell County, North Carolina: description and crystal structure. Canadian Mineralogist, 49, 57-62.
Fluorite
Formula: CaF2
Reference: Jacquot Jr,Richard James.,2003,Rock ,Gem,and Mineral Collecting Sites In Western North Carolina
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; American Mineralogist,Vol.18,No.4,April,1933 pp 148-159
'Hornblende'
Reference: Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
'Microlite Group'
Formula: A2-mTa2X6-wZ-n
Reference: Tappen,Christine.,Smith S. Michael.,and Dockal A. James (2006) Beryl ( Aquamarine,Emerald,Green,and Yellow) and Tourmaline of the Crabtree Pegmatite, Spruce Pine District Mitchell County, North Carolina: Proceedings of the 42nd Forum the Geology of Industrial Minerals at Asheville, North Carolina, Information Circular 34, NCGS
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Tappen,Christine.,Smith S. Michael.,and Dockal A. James (2006) Beryl ( Aquamarine,Emerald,Green,and Yellow) and Tourmaline of the Crabtree Pegmatite, Spruce Pine District Mitchell County, North Carolina: Proceedings of the 42nd Forum the Geology of Industrial Minerals at Asheville, North Carolina, Information Circular 34, NCGS
Pyrite
Formula: FeS2
Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Quartz
Formula: SiO2
Reference: Clark,Christine M.,Hawthorne,Frank C.,and Ottolini,L.(2011)Fluor-Dravite,NaMg3Al6Si6O18(BO3)3(OH)3F,A new mineral species of the tourmaline group from the Crabtree Emerald Mine,Mitchell County,North Carolina:Description and crystal structure:Vol.49 pp.57-62
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Streeter,Michael.,2003, A Rockhounding Guide to North Carolinas Blue Ridge Mountains
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Description: Schorl is intermediate in chemistry. Falls in the Dravite-Schorl series.
Reference: Jacquot Jr,Richard James., 2003, Rock, Gem,and Mineral Collecting Sites In Western North Carolina, pg # 56; American Mineralogist,Vol.18,No.4,April,1933 pp 148-159
Spessartine
Formula: Mn2+3Al2(SiO4)3
Reference: Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS
Titanite
Formula: CaTi(SiO4)O
Reference: Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS
Xenotime-(Y)
Formula: Y(PO4)
Reference: Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS
Zircon
Formula: Zr(SiO4)
Reference: Dockal, James A., and Smith, Michael S. (2007) Petrography of the County Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina :University of North Carolina Wilmington
Zoisite
Formula: Ca2Al3[Si2O7][SiO4]O(OH)
Reference: Tappen,Christine,Smith,Michael and Dockal,James (2006) Beryl (Aquamarine,Emerald,Green and Yellow) and Tourmaline of the Crabtree Pegmatite,Spruce Pine District,Mitchell County,North Carolina Proceedings of the 42nd Forum on the Geology of Industrial Minerals at Asheville, North Carolina,Information Circular 34, NCGS

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Pyrite2.EB.05aFeS2
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
'Microlite Group'4.00.A2-mTa2X6-wZ-n
Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
Xenotime-(Y)8.AD.35Y(PO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Almandine9.AD.25Fe2+3Al2(SiO4)3
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Emerald9.CJ.05Be3Al2(Si6O18)
var: Heliodor9.CJ.05Be3Al2(Si6O18)
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Fluor-dravite (TL)9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Zoisite9.BG.10Ca2Al3[Si2O7][SiO4]O(OH)
Unclassified Minerals, Rocks, etc.
'Apatite'-Ca5(PO4)3(Cl/F/OH)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Dravite-Schorl Series'-
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Microlite Group'8.2.2.1A2-mTa2X6-wZ-n
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Spessartine51.4.3a.3Mn2+3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Zoisite58.2.1b.1Ca2Al3[Si2O7][SiO4]O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Six-Membered Rings with Al substituted rings
Cordierite61.2.1.1(Mg,Fe)2Al3(AlSi5O18)
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Albite76.1.3.1Na(AlSi3O8)
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Apatite'-Ca5(PO4)3(Cl/F/OH)
Beryl
var: Aquamarine
-Be3Al2Si6O18
var: Emerald-Be3Al2(Si6O18)
var: Heliodor-Be3Al2(Si6O18)
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Chlorite Group'-
'Dravite-Schorl Series'-
Fluor-dravite (TL)-Na(Mg3)Al6(Si6O18)(BO3)3(OH)3F
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
Quartz
var: Smoky Quartz
-SiO2
Xenotime-(Y)-Y(PO4)

List of minerals for each chemical element

HHydrogen
H Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
H MuscoviteKAl2(AlSi3O10)(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H ApatiteCa5(PO4)3(Cl/F/OH)
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
BeBeryllium
Be Beryl (var: Emerald)Be3Al2(Si6O18)
Be BerylBe3Al2(Si6O18)
Be Beryl (var: Aquamarine)Be3Al2Si6O18
Be Beryl (var: Heliodor)Be3Al2(Si6O18)
BBoron
B Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
OOxygen
O Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
O QuartzSiO2
O AlbiteNa(AlSi3O8)
O Beryl (var: Emerald)Be3Al2(Si6O18)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Garnet GroupX3Z2(SiO4)3
O BerylBe3Al2(Si6O18)
O Beryl (var: Aquamarine)Be3Al2Si6O18
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Beryl (var: Heliodor)Be3Al2(Si6O18)
O Quartz (var: Smoky Quartz)SiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O AlmandineFe32+Al2(SiO4)3
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O SpessartineMn32+Al2(SiO4)3
O Xenotime-(Y)Y(PO4)
O TitaniteCaTi(SiO4)O
O ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O MagnetiteFe2+Fe23+O4
O ZirconZr(SiO4)
O ApatiteCa5(PO4)3(Cl/F/OH)
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
FFluorine
F Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F FluoriteCaF2
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Na AlbiteNa(AlSi3O8)
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
AlAluminium
Al Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Al AlbiteNa(AlSi3O8)
Al Beryl (var: Emerald)Be3Al2(Si6O18)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al BerylBe3Al2(Si6O18)
Al Beryl (var: Aquamarine)Be3Al2Si6O18
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al Beryl (var: Heliodor)Be3Al2(Si6O18)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al AlmandineFe32+Al2(SiO4)3
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al SpessartineMn32+Al2(SiO4)3
Al ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
SiSilicon
Si Fluor-draviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3F
Si QuartzSiO2
Si AlbiteNa(AlSi3O8)
Si Beryl (var: Emerald)Be3Al2(Si6O18)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Garnet GroupX3Z2(SiO4)3
Si BerylBe3Al2(Si6O18)
Si Beryl (var: Aquamarine)Be3Al2Si6O18
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Beryl (var: Heliodor)Be3Al2(Si6O18)
Si Quartz (var: Smoky Quartz)SiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si AlmandineFe32+Al2(SiO4)3
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si SpessartineMn32+Al2(SiO4)3
Si TitaniteCaTi(SiO4)O
Si ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si ZirconZr(SiO4)
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
PPhosphorus
P Xenotime-(Y)Y(PO4)
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S PyriteFeS2
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca FluoriteCaF2
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Ca TitaniteCaTi(SiO4)O
Ca ZoisiteCa2Al3[Si2O7][SiO4]O(OH)
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca ApatiteCa5(PO4)3(Cl/F/OH)
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
TiTitanium
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn SpessartineMn32+Al2(SiO4)3
FeIron
Fe PyriteFeS2
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe AlmandineFe32+Al2(SiO4)3
Fe MagnetiteFe2+Fe23+O4
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
YYttrium
Y Xenotime-(Y)Y(PO4)
ZrZirconium
Zr ZirconZr(SiO4)
TaTantalum
Ta Microlite GroupA2-mTa2X6-wZ-n

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Lesure, F.G. (1968), Mica Deposits of the Blue Ridge in North Carolina, USGS Professional Paper 577: 12.
Sinkankas, John; (1981), Emerald and Other Beryls: 570-572,
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10025992, 10199556 & 10248802.
Tappen, Christine, Smith, Michael & Dockal, James (2006), Beryl (Aquamarine, Emerald, Green and Yellow) and Tourmaline of the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina, Proceedings of the 42nd Forum on the Geology of Industrial Minerals, at Asheville, North Carolina, Information Circular 34, North Carolina Geological Survey.
Dockal, James A. and Smith, Michael S. (2007) Petrography of the Country Rock Surrounding the Crabtree Pegmatite, Spruce Pine District, Mitchell County, North Carolina. Petrology and Tectonics of the Southern Appalachians, Geological Society of America Abstracts with Programs: 39(2): 26.
Clark, C.M., Hawthorne, F.C., Ottolini, L. (2011): Fluor-dravite, NaMg3Al6Si6O18(BO3)3(OH)3F, a new mineral of the tourmaline group from the Crabtree emerald mine, Mitchell County, North Carolina: description and crystal structure. Canadian Mineralogist, 49, 57-62.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0371210028 & 0371210080.

USGS MRDS Record:10025992

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