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Board Exam > Mineral Glossary > Flashcards

Mineral Glossary Flashcards

1
Q

The following minerals are under the olivine group except:
a. Kirschsteinite
b. Monticellite
c. Tephroite
d. Piemontite

A

Ans: Piemontite [ Ca2(Al, Fe, Mn)3(SiO4)3(OH) /Sorosi/Epidote/Monoclinic]

• Kirschsteinite [ CaFeSiO4/Neso/orthorhom ]
• Monticellite [ CaMgSiO4/Neso/orthorhom ]
• Tephroite [ CaFeSiO4/Neso/orthorhom ]

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2
Q

The following are NOT axinites except:
a. Cordierite
b. Tinzenite
c. Beryl
d. Dravite

A

Answer: Tinzenite [ (Ca,Mn)2MnAl2BSi4O15(OH) /Axinite/Triclinic/Cyclo ]

• Cordierite [ Mg2Al4Si5O18 /Orthorhombic/Cyclo]
• Beryl [ Be3Al2Si6O18 /Hexagonal/Cyclo]
• Dravite [ NaMg3Al6(BO3)3Si6O18(OH)3F /Isometric/Tourmaline/Cyclo]

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3
Q

It is the distinguishing elements found in the formula of the Epidote Family

A

Emperical: (SiO4)3(OH)
Extended: (Si2O7)(SiO4)O(OH)

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4
Q

The mineral calamine is primarily composed of

A

Zinc Carbonate (also Zinc spar/Smithsonite)

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5
Q

It is a Zn-rich mineral under the Spinel series characterized by its blue-green, yellow, or brown appearance with grey streak.
a. Spinel
b. Hercynite
c. Gahnite
d. Galaxite

A

Answer: Gahnite

Sphegahgalites (Mg,Fe,Zn,Mn)Al2O4

a. Spinel (Mg-rich, colorless, green, blue, red, white streak)
b. Hercynite (Fe-rich, black, dark green streak)
d. Galaxite (Mn-rich, dark yellow to black, red-brown streak)

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6
Q

It is an alteration product of Periclase and is commonly found in Marbles

A

Periclase - MgO alters to Brucite - Mg(OH)2

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7
Q

It is the green variety of iron-rich garnet.

A

Demantoid (Green Andradite, Cr impurities)

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8
Q

It is the yellow variety of iron-rich garnet.

A

Topazolite (Andradite)

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9
Q

What is the color of common iron-rich garnet?

A

Brown (Common Andradite)

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10
Q

It is the black variety of iron-rich garnet.

A

Melanite (Andradite, Ti inclusions)

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11
Q

It is the deep yellow or golden orange variety of Al-rich garnet.

A

Hessonite “Cinnamon Stone” (Grossular, Mn impurities)

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12
Q

It is the green variety of Al-rich garnet.

A

Tsavorite (Grossular, V impurities)

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13
Q

It is the red variety of Mg-rich garnet.

A

Rhodolite (Pyrope)

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14
Q

If spinel contains substantial Fe2+ it is called:

A

Pleonaste

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15
Q

A variety of Fe-rich Spinel in which substantial Cr have been replaced for Al.

A

Picotite (Hercynite)

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16
Q

A monoclinic aluminum hydroxide mineral and is a common weathering product of feldspar

A

Gibbsite - Al(OH)2

17
Q

Dolomite and ankerite are part of a solid solution between dolomite [CaMg(CO3)2] and ferrodolomite [CaFe(CO3)2]. What [CaFe(CO3)2] percentage marks the boundary of dolomite and ankerite?

A

< 20% [CaFe(CO3)2] = Dolomite
20 - 75% [CaFe(CO3)2] = Ankerite

18
Q

All of the calcite group have what crystal system?

A

Rhombohedral/Trigonal

19
Q

A helictitic, sometimes coral-like variety of Aragonite, also called stalactitic cave aragonite.

A

Flos Ferri

20
Q

It is the Strontium-bearing Aragonite.
a. Minrecordite
b. Mossottite
c. Tarnowitzite
d. Nicolsonite

A

Answer: Mossottite (CaCO3)

a. Minrecordite (Zn-rich Dolomite)
c. Tarnowitzite (Lead-bearing Aragonite)
d. Nicolsonite (Zinc-bearing Aragonite)

21
Q

Borax is called _____ if it is dehydrated to a crumbly mass on exposure to air.

A

Tincalconite (Tin Cal)

22
Q

It is the mineral form of Boric Acid.
a. Borax
b. Colemanite
c. Sinhalite
d. Sassolite

A

Answer: Sassolite - H3BO4

a. Borax - Na2(B2O4)(OH)4•8H2O
b. Colemanite - Ca2B6O11•5H2O
c. Sinhalite - MgAlBO4

23
Q

Formed by metasomatic reactions between boron-bearing hydrothermal solutions and rhodochrosite in banded manganese deposits.
a. Sassolite
b. Sinhalite
c. Kotoite
d. Jimboite

A

Answer: Jimboite (Mn3B2O6)

a. Sassolite (H3BO4)
b. Sinhalite (MgAlBO4)
c. Kotoite (Mg3B2O6)

24
Q

It is a borate mineral described as contact metamorphosed dolomite.
a. Sassolite
b. Sinhalite
c. Kotoite
d. Jimboite

A

Answer: Kotoite (Mg3B2O6), Dolomite [CaMg(CO3)2]

a. Sassolite (H3BO4)
b. Sinhalite (MgAlBO4)
d. Jimboite (Mn3B2O6)

25
Q

Accessory mineral formed in boron-rich skarns at the contact of limestones with granite or gneiss. First discovered in Sri Lanka.
a. Sassolite
b. Sinhalite
c. Kotoite
d. Jimboite

A

Answer: Sinhalite (MgAlBO4)

a. Sassolite (H3BO4)
c. Kotoite (Mg3B2O6)
d. Jimboite (Mn3B2O6)

26
Q

This Gibbsite-type hydroxide is characterized by vein or fissure-filling material in dolomitic oil shale.
a. Diaspore
b. Boehmite
c. Gibbsite
d. Nordstrandite

A

Answer: Nordstrandite [Al(OH)3]

a. Diaspore [AlO(OH)] - metamorphic and sedimentary bauxite ores
b. Boehmite [AlO(OH)] - major constituent of most bauxite ores
c. Gibbsite [Al(OH)3] - developed on aluminous rocks in areas of high rainfall

27
Q

This Gibbsite-type hydroxide is found in lateritic soils developed on aluminous rocks in areas of high rainfall.
a. Diaspore
b. Boehmite
c. Gibbsite
d. Nordstrandite

A

Answer: Gibbsite [Al(OH)3]

a. Diaspore [AlO(OH)] - metamorphic and sedimentary bauxite ores
b. Boehmite [AlO(OH)] - major constituent of most bauxite ores
d. Nordstrandite [Al(OH)3] - vein or fissure-filling material in dolomitic oil shale

28
Q

What is the formula of Calomel?

A

HgCl

29
Q

What is the other name of Quadratic System?

A

Tetragonal

30
Q

is a microcrystalline form of quartz (SiO2) that is derived by the alteration of chert, chalcedony, or novaculite, or leaching of highly siliceous limestones.

A

Tripoli

31
Q

What is the formula of Tennantite?

A

Cu12As4S13

32
Q

It is the alternative name for Sphene

A

Titanite CaTiSiO4

33
Q

Andalusite sometimes develops a black cross formed by tiny carbonaceous inclusions. This variety is called

A

Chiastolite

34
Q

_____ occurs with kyanite and cordierite which indicate a high pressure metamorphic environment. Cruciform twin is a characteristic feature of such mineral.

A

Staurolite

Board Exam (20 decks)

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