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About ChesteriteHide

Chester, Vermont
colorless to very light pinkish brown
2 - 2½
Crystal System:
Named for the town of Chester, Vermont, near the type locality.
Dimorph of:
This page provides mineralogical data about Chesterite.

Classification of ChesteriteHide

Approval Year:
First Published:
Approval History:

9 : SILICATES (Germanates)
D : Inosilicates
F : Inosilicates with 2-periodic multiple chains

68 : INOSILICATES Structures with Chains of More Than One Width
1 : Structures with Chains of More Than One Width

14 : Silicates not Containing Aluminum
21 : Silicates of Fe and Mg

Physical Properties of ChesteriteHide

colorless to very light pinkish brown
colorless in thin section
2 - 2½ on Mohs scale

Optical Data of ChesteriteHide

Biaxial (-)
RI values:
nα = 1.617 nβ = 1.632 nγ = 1.640
Measured: 71° , Calculated: 70°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v

Chemical Properties of ChesteriteHide

IMA Formula:
Common Impurities:

Crystallography of ChesteriteHide

Crystal System:
Cell Parameters:
a = 18.61 Å, b = 45.3 Å, c = 5.29 Å
a:b:c = 0.411 : 1 : 0.117
Unit Cell V:
4,459.64 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
11.327 Å(41)
8.609 Å(100)
3.751 Å(34)
3.246 Å(49)
3.076 Å(66)
2.779 Å(31)
2.554 Å(36)

Type Occurrence of ChesteriteHide

General Appearance of Type Material:
Intergrowths in anthophyllite and cummingtonite. Radiating sprays of prismatic crystals to 5 cm.
Place of Conservation of Type Material:
Royal Ontario Museum, Toronto, Canada, M36083.
Harvard University, Cambridge, Massachusetts, 134079.
National Museum of Natural History, Washington, D.C., USA, 145869.
Geological Setting of Type Material:
'Blackwall zone' or the chlorite- or biotite-bearing metasomatic reaction zone sometimes found at the boundary of a metamorphosed ultramafic body.
Veblen, D.R., Burnham, C.W. (1978) New biopyriboles from Chester, Vermont: I. Descriptive mineralogy. American Mineralogist: 63: 1000-1009.

Synonyms of ChesteriteHide

Other Language Names for ChesteriteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Chesterite associated with Jimthompsonite(Mg,Fe)5Si6O16(OH)2
2 photos of Chesterite associated with Clinojimthompsonite(Mg,Fe)5Si6O16(OH)2
1 photo of Chesterite associated with TalcMg3Si4O10(OH)2
1 photo of Chesterite associated with Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
1 photo of Chesterite associated with MagnetiteFe2+Fe3+2O4

Related Minerals - Nickel-Strunz GroupingHide

9.DF.05Clinojimthompsonite(Mg,Fe)5Si6O16(OH)2Mon. 2/m : B2/b
9.DF.05Jimthompsonite(Mg,Fe)5Si6O16(OH)2Orth. mmm (2/m 2/m 2/m) : Pbca
9.DF.15ErshoviteNa4K3(Fe,Mn,Ti)2Si8O22(OH)4 · 4H2OTric.
9.DF.15ParaershoviteNa3K3Fe3+2Si8O20(OH)4 · 4H2OTric. 1 : P1
9.DF.20Tvedalite(Ca,Mn)4Be3Si6O17(OH)4 · 3H2OOrth.
9.DF.25BaveniteCa4Be2Al2Si9O26(OH)2Orth. mm2
9.DF.30BigcreekiteBaSi2O5 · 4H2OOrth. mmm (2/m 2/m 2/m) : Pnma

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.21.2Ringwoodite(Mg,Fe2+)2SiO4Iso. m3m (4/m 3 2/m) : Ia3d
14.21.4ClinoferrosiliteFe2+SiO3Mon. 2/m : P21/b
14.21.5Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
14.21.7 Magnesiocummingtonite☐{Mg2}{Mg5}(Si8O22)(OH)2
14.21.8Grunerite☐{Fe2+2}{Fe2+5}(Si8O22)(OH)2Mon. 2/m : B2/m
14.21.9MinnesotaiteFe2+3Si4O10(OH)2Tric. 1 : P1
14.21.11Jimthompsonite(Mg,Fe)5Si6O16(OH)2Orth. mmm (2/m 2/m 2/m) : Pbca
14.21.12Clinojimthompsonite(Mg,Fe)5Si6O16(OH)2Mon. 2/m : B2/b

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ChesteriteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Veblen, D.R., Burnham, C.W. (1978) New biopyriboles from Chester, Vermont: I. Descriptive mineralogy. American Mineralogist: 63: 1000-1009.
Veblen, D.R., Burnham, C.W. (1978) New biopyriboles from Chester, Vermont: II. The crystal chemistry of jimthompsonite, clinojimthompsonite, and chesterite, and the amphibole-mica reaction. American Mineralogist: 63: 1053-1073.

Internet Links for ChesteriteHide

Localities for ChesteriteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Greenland
    • Sermersooq
      • Nuuk (Godthåb)
  • Southwest Finland
    • Salo
      • Kisko
Schumacher, J. & Czank, M. 1987. Mineralogy of triple- and double-chain pyriboles from Orijärvi, southwest Finland. The American Mineralogist 72 ( 3-4) 345-352.
  • Iwate Prefecture
    • Kitakami Mountains
Konishi, et al (1991) Abstract of the Meeting of the Mineralogical Society of Japan, 101.
  • Nordland
    • Meløy
Selbekk R.S. (2010) Norges mineraler. En revidert utgave av Norges mineraler (Neumann 1985). Tapir-NGU-NHM, 552 pp.
  • Ticino
    • Vallemaggia
      • Lavizzara Valley
        • Fusio
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 229-230.
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 229-230.
    • Verzasca Valley
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 229.
  • Scotland
    • Highland
Droop, G.T.R. (1994) Triple-chain pyriboles in Lewisian ultramafic rocks. Mineralogical Magazine, 58, 11, 1-20.
  • Montana
  • Vermont
    • Windsor Co.
      • Chester
Gait, R.I., Veblen, D.R. (1996) Chesterite, Jimthompsonite, and Clinojimthompsonite: From the Type Locality Carlton Quarry, Chester, Windsor County, Vermont. Rocks & Minerals, 71:4, 275-280. Veblen, D.R., Burnham, C.W. (1978) New Biopyriboles from Chester Vermont: I. Descriptive Mineralogy. American Mineralogist, 63:1000-1009.
Mineral and/or Locality  
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