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St John's Island, Red Sea Governorate, Egypti
Regional Level Types
St John's IslandIsland
Red Sea GovernorateGovernorate
EgyptCountry

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Type:
Mindat Locality ID:
6423
Long-form identifier:
mindat:1:2:6423:4
GUID (UUID V4):
82385782-750f-4097-a13d-842bca4ebf2c
Other/historical names associated with this locality:
Zagbargad Island; Zabargad Island; Zebirget; Seberged; Topazios
Other Languages:
French:
Zabargad, Gouvernorat de la Mer-Rouge, Égypte
German:
St.-Johannes-Insel, Gouvernement al-Bahr al-ahmar, Ägypten
Russian:
Зебергед, Красное Море, Египет
Simplified Chinese:
宰拜爾傑德島, 红海省, 埃及
Spanish:
Isla de San Juan, Gobernación del Mar Rojo, Egipto
Arabic:
جزيرة زبرجد, محافظة البحر الأحمر, مصر
Belarusian (Tarashkevitsa):
Зэбэрджэд, Багр эль-Агмар, Эгіпет
Catalan:
ilhas de São João, Governació de la Mar Roja, Egipte
Cebuano:
Jazīrat Zabarjad, Red Sea Governorate, Ehipto
Czech:
Zabargad, Al-Bahri al-Ahmari, Egypt
Greek:
Ζαμπαργκάντ, Κυβερνείο Ερυθράς Θάλασσας, Αίγυπτος
Japanese:
ザバルガッド島, 紅海県, エジプト
Polish:
Dżazirat Zabardżad, Prowincja Morza Czerwonego, Egipt
Portuguese:
Zabargad, Mar Vermelho, Egito
Swedish:
Jazīrat Zabarjad, Al-Bahr al-Ahmar, Egypten


A quaternary volcanic island, 3 x 2 km in size, which is an ancient (3rd century) locality of gem peridot. The gem peridot is found in olivenite dikes with widths in the dm to m scale. These dykes consist of large platy olivine crystals (up to 20 cm) of brown color, with some serpentine in the interstices. They have abundant open cavities which occasionally contain transparent crystals of green peridot. The large brown olivine crystals tend to become inclusion-poor and green at the margins, ending in these cavities.

The Greco-Roman name of the island, Topazios, is believed to have given the name to topaz.

Largest of a group of islands in Foul Bay; located 46 km south-east of Ras Banas.

Note: The island is part of the Gebel Elba National Park.

Presence of spinel-lherzolites with anhydrous Al-diopside pyroxenites and hydrous Cr-diopside pyroxenites layers.

In the 19th century, geologists re-explored old mines and found interesting nickel deposits, which were later mined in the Nasser era around 1960.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

23 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Actinolite
Formula: ◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Brochantite ?
Formula: Cu4(SO4)(OH)6
'Clinopyroxene Subgroup'
Cordierite
Formula: (Mg,Fe)2Al3(AlSi5O18)
Davyne
Formula: (Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Forsterite
Formula: Mg2SiO4
Habit: The crystals are elongated along the a-axis so that the brachy pinacoid b(010), which is markedly striated vertically to the c-axis, forms the largest face
Colour: yellowish green to grass green
Description: Composition of gem peridot is Fo92Fa8.
Forsterite var. Peridot
Formula: Mg2SiO4
Gypsum
Formula: CaSO4 · 2H2O
Hercynite
Formula: Fe2+Al2O4
Hercynite var. Picotite
Formula: (Fe,Mg)(Al,Cr)2O4
Ilmenite
Formula: Fe2+TiO3
Kaersutite ?
Formula: NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Langite
Formula: Cu4(SO4)(OH)6 · 2H2O
Laurite
Formula: RuS2
Lizardite
Formula: Mg3(Si2O5)(OH)4
Magnesio-hornblende
Formula: ◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Magnesite
Formula: MgCO3
Magnetite
Formula: Fe2+Fe3+2O4
Magnetite var. Titanium-bearing Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Moncheite
Formula: Pt(Te,Bi)2
'Orthopyroxene Subgroup'
Pargasite
Formula: NaCa2(Mg4Al)(Si6Al2)O22(OH)2
Description: Ti-pargasites.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Description: Ti-phlogopite in Cr-diopside pyroxenits.
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Description: Formed during late decompression stage.
Platinum
Formula: Pt
Potarite
Formula: PdHg
Rutile
Formula: TiO2
Spinel
Formula: MgAl2O4
Description: - Cr/Al spinels in lherzolites - Al/Mg green spinels in Al-diopside pyroxenites
Tremolite
Formula: ◻Ca2Mg5(Si8O22)(OH)2

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Potarite1.AD.25PdHg
Platinum1.AF.10Pt
Group 2 - Sulphides and Sulfosalts
Moncheite2.EA.20Pt(Te,Bi)2
Laurite2.EB.05aRuS2
Group 4 - Oxides and Hydroxides
Hercynite
var. Picotite
4.BB.05(Fe,Mg)(Al,Cr)2O4
4.BB.05Fe2+Al2O4
Magnetite
var. Titanium-bearing Magnetite
4.BB.05Fe2+(Fe3+,Ti)2O4
4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
Ilmenite4.CB.05Fe2+TiO3
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
Magnesite5.AB.05MgCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Brochantite ?7.BB.25Cu4(SO4)(OH)6
Gypsum7.CD.40CaSO4 · 2H2O
Langite7.DD.10Cu4(SO4)(OH)6 · 2H2O
Group 9 - Silicates
Forsterite9.AC.05Mg2SiO4
var. Peridot9.AC.05Mg2SiO4
Cordierite9.CJ.10(Mg,Fe)2Al3(AlSi5O18)
Tremolite9.DE.10◻Ca2Mg5(Si8O22)(OH)2
Actinolite9.DE.10◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Magnesio-hornblende9.DE.10◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Pargasite9.DE.15NaCa2(Mg4Al)(Si6Al2)O22(OH)2
Kaersutite ?9.DE.15NaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Lizardite9.ED.15Mg3(Si2O5)(OH)4
Davyne9.FB.05(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Unclassified
'Clinopyroxene Subgroup'-
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Orthopyroxene Subgroup'-
'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
H Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
H BrochantiteCu4(SO4)(OH)6
H GypsumCaSO4 · 2H2O
H LangiteCu4(SO4)(OH)6 · 2H2O
H LizarditeMg3(Si2O5)(OH)4
H Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
H PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Tremolite◻Ca2Mg5(Si8O22)(OH)2
H ApatiteCa5(PO4)3(Cl/F/OH)
CCarbon
C MagnesiteMgCO3
OOxygen
O Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
O BrochantiteCu4(SO4)(OH)6
O Cordierite(Mg,Fe)2Al3(AlSi5O18)
O Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
O ForsteriteMg2SiO4
O GypsumCaSO4 · 2H2O
O HercyniteFe2+Al2O4
O IlmeniteFe2+TiO3
O KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
O LangiteCu4(SO4)(OH)6 · 2H2O
O LizarditeMg3(Si2O5)(OH)4
O MagnesiteMgCO3
O Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
O MagnetiteFe2+Fe23+O4
O PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
O PhlogopiteKMg3(AlSi3O10)(OH)2
O RutileTiO2
O SpinelMgAl2O4
O Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
O Tremolite◻Ca2Mg5(Si8O22)(OH)2
O Forsterite var. PeridotMg2SiO4
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
O ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Na KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Na PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mg Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Mg Cordierite(Mg,Fe)2Al3(AlSi5O18)
Mg ForsteriteMg2SiO4
Mg KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Mg LizarditeMg3(Si2O5)(OH)4
Mg MagnesiteMgCO3
Mg Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Mg PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg SpinelMgAl2O4
Mg Tremolite◻Ca2Mg5(Si8O22)(OH)2
Mg Forsterite var. PeridotMg2SiO4
Mg Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
AlAluminium
Al Cordierite(Mg,Fe)2Al3(AlSi5O18)
Al Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Al HercyniteFe2+Al2O4
Al KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Al Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Al PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al SpinelMgAl2O4
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Al Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
SiSilicon
Si Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Si Cordierite(Mg,Fe)2Al3(AlSi5O18)
Si Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Si ForsteriteMg2SiO4
Si KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Si LizarditeMg3(Si2O5)(OH)4
Si Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Si PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Tremolite◻Ca2Mg5(Si8O22)(OH)2
Si Forsterite var. PeridotMg2SiO4
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S BrochantiteCu4(SO4)(OH)6
S Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
S GypsumCaSO4 · 2H2O
S LangiteCu4(SO4)(OH)6 · 2H2O
S LauriteRuS2
ClChlorine
Cl Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Cl ApatiteCa5(PO4)3(Cl/F/OH)
KPotassium
K Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Ca Davyne(Na,K)6Ca2(Al6Si6O24)(Cl2,SO4)2
Ca GypsumCaSO4 · 2H2O
Ca KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Ca Magnesio-hornblende◻Ca2(Mg4Al)(Si7Al)O22(OH)2
Ca PargasiteNaCa2(Mg4Al)(Si6Al2)O22(OH)2
Ca Tremolite◻Ca2Mg5(Si8O22)(OH)2
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca ApatiteCa5(PO4)3(Cl/F/OH)
TiTitanium
Ti IlmeniteFe2+TiO3
Ti KaersutiteNaCa2(Mg3AlTi4+)(Si6Al2)O22O2
Ti RutileTiO2
Ti Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
CrChromium
Cr Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
FeIron
Fe Actinolite◻Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22(OH)2
Fe Cordierite(Mg,Fe)2Al3(AlSi5O18)
Fe HercyniteFe2+Al2O4
Fe IlmeniteFe2+TiO3
Fe MagnetiteFe2+Fe23+O4
Fe Magnetite var. Titanium-bearing MagnetiteFe2+(Fe3+,Ti)2O4
Fe Hercynite var. Picotite(Fe,Mg)(Al,Cr)2O4
CuCopper
Cu BrochantiteCu4(SO4)(OH)6
Cu LangiteCu4(SO4)(OH)6 · 2H2O
RuRuthenium
Ru LauriteRuS2
PdPalladium
Pd PotaritePdHg
TeTellurium
Te MoncheitePt(Te,Bi)2
PtPlatinum
Pt MoncheitePt(Te,Bi)2
Pt PlatinumPt
HgMercury
Hg PotaritePdHg
BiBismuth
Bi MoncheitePt(Te,Bi)2

Fossils

There are 1 fossil localities from the PaleoBioDB database within this region.

BETA TEST - These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences18
Youngest Fossil Listed0.01 Ma (Pleistocene)
Oldest Fossil Listed2.59 Ma (Pleistocene)
Fossils from RegionClick here to show the list.
Accepted NameHierarchy Age
Acropora
genus
Animalia : Cnidaria : Anthozoa : Acropora2.588 - 0.781 Ma
Pleistocene
Fungia
genus
Animalia : Cnidaria : Anthozoa : Scleractinia : Fungiidae : Fungia2.588 - 0.781 Ma
Pleistocene
Goniastrea
genus
Animalia : Cnidaria : Anthozoa : Scleractinia : Merulinidae : Goniastrea2.588 - 0.781 Ma
Pleistocene
Porites
genus
Animalia : Cnidaria : Anthozoa : Scleractinia : Poritidae : Porites2.588 - 0.781 Ma
Pleistocene
Trochus
genus
Animalia : Mollusca : Gastropoda : Pleurotomariida : Pseudophoridae : Trochus2.588 - 0.781 Ma
Pleistocene
Cypraea
genus
Animalia : Mollusca : Gastropoda : Littorinimorpha : Cypraeidae : Cypraea2.588 - 0.781 Ma
Pleistocene
Strombus
genus
Animalia : Mollusca : Gastropoda : Littorinimorpha : Strombidae : Strombus0.126 - 0.0117 Ma
Pleistocene
Conus
genus
Animalia : Mollusca : Gastropoda : Neogastropoda : Conidae : Conus2.588 - 0.781 Ma
Pleistocene
Lithophaga
genus
Animalia : Mollusca : Bivalvia : Mytilida : Mytilidae : Lithophaga2.588 - 0.781 Ma
Pleistocene
Diplodonta
genus
Animalia : Mollusca : Bivalvia : Venerida : Ungulinidae : Diplodonta0.126 - 0.0117 Ma
Pleistocene
Heterocentrotus
genus
Animalia : Echinodermata : Echinoidea : Camarodonta : Echinometridae : Heterocentrotus2.588 - 0.781 Ma
Pleistocene
Casmaria ponderosa
species
Animalia : Mollusca : Gastropoda : Littorinimorpha : Cassidae : Casmaria : Casmaria ponderosa2.588 - 0.781 Ma
Pleistocene
Lucinidae
family
Animalia : Mollusca : Bivalvia : Lucinida : Lucinidae2.588 - 0.781 Ma
Pleistocene
Pectinidae
family
Animalia : Mollusca : Bivalvia : Pectinida : Pectinidae2.588 - 0.781 Ma
Pleistocene
Pteria penguin
species
Animalia : Mollusca : Bivalvia : Ostreida : Pteriidae : Pteria : Pteria penguin2.588 - 0.781 Ma
Pleistocene
Strombus (Gibberulus) gibberulus
species
Animalia : Mollusca : Gastropoda : Strombidae : Strombus : Strombus (Gibberulus) gibberulus2.588 - 0.781 Ma
Pleistocene
Codakia tigerina
species
Animalia : Mollusca : Bivalvia : Lucinida : Lucinidae : Codakia : Codakia tigerina2.588 - 0.781 Ma
Pleistocene
Barbatia (Barbatia) lacerata
species
Animalia : Mollusca : Bivalvia : Arcida : Arcidae : Barbatia : Barbatia (Barbatia) lacerata2.588 - 0.781 Ma
Pleistocene
Fossil LocalitiesClick to show 1 fossil locality

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Zabargad_Island
Wikidata ID:Q389131
GeoNames ID:346207

Mindat Articles

Peridot from St. John's / Zabargad Island by Olav Revheim


Localities in this Region

Other Regions, Features and Areas that Intersect

African PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

 
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