Hand Samples

Question 1

Answer 1

Quartz

SiO₂

trigonal

Framework Silicates

Silica Group

Question 2

Answer 2

Apatite

Ca₅(PO₄)₃(F,Cl,OH)

Hexagonal

Phosphate Group

Question 3

Answer 3

Calcite

CaCO₃

Trigonal

Calcite Group

Carbonates

Question 4

Answer 4

Topaz

Al₂(SiO₄)(F,OH)₂

Orthorhombic

Silicate Group

Orthosilicate

Question 5

Answer 5

Forsterite

Mg₂SiO₄

Orthorhombic

Orthosilicate

Olivine Group

Question 6

Answer 6

Fayalite

Fe₂SiO₄

Orthorhombic

Orthosilicate

Olivine Group

Question 7

Answer 7

Staurolite

(Fe²⁺,Mg,Zn)_1.5-2Al₉(SiO₄)₄O₆(OH,O)₂

Monoclinic

Silicate Group

Nesosilicates

Question 8

Answer 8

Almandine

Fe₃Al₂Si₃O12

Isometric

Garnet Group

Nesosilicate

Question 9

Answer 9

Pyrope

Mg₃Al₂Si₃O₁₂

Garnet Group

Orthosilicate

Isometric

Question 10

Answer 10

Spessartine

Mn₃Al₂Si₃O₁₂

Garnet Group

Orthosilicate

Isometric

Question 11

Answer 11

Andradite

(Can also be green, yellow, and purple)

Ca₃Fe₂Si₃O₁₂

Garnet Group

Nesosilicate

Isometric

Question 12

Answer 12

Grossular

Ca₃Al₂Si₃O₁₂

Garent Group

Nesosilicate

Isometric

Question 13

Answer 13

Epidote

{Ca₂}{Al₂Fe³⁺}(Si₂O₇)O(OH)

Monoclinic

Clinozoisite Group

Sorosilicates

Question 14

Answer 14

Zircon

ZrSiO₄

Zircon Group

Tetragonal

Orthosilicate

Question 15

Answer 15

Andalusite

Al₂SiO5

Orthorhombic

Silicate Group

Nesosilicate

Question 16

Answer 16

Kyanite

Al₂SiO₅

Triclinic

Silica Group

Nesosilicate

Question 17

Answer 17

Sillimanite

Al₂SiO₅

Orthorhombic

Nesosilicate

Silica Group

Question 18

Answer 18

Titanite

(Can also be green or yellow)

Al₂SiO₅

Orthorhombic

Nesosilicate

Silica Group

Question 19

Answer 19

Beryl

(can basically be any color in hexagonal crystal)

Be₃Al₂(Si₆O₁₈)

Hexagonal

Beryl Group

Cyclosilicate

Question 20

Answer 20

Cordierite

(can also be yellow or red)

(Mg,Fe)₂Al₃(AlSi₅O₁₈)

Orthorhombic

Silica Group

Cyclosilicate

Question 21

Answer 21

Schorl

Na(Fe₃²⁺)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

Trigonal

Tourmaline Group

Cyclosilicate

Question 22

Answer 22

Elbaite

(can be a variety of other colors)

Na(Li_1.5Al_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)

Trigonal

Tourmaline Group

Cyclosilicate

Question 23

Answer 23

Enstatite

MgSiO₃

Pyroxene Group

Orthorhombic

Orthosilicate

Question 24

Answer 24

Diopside

CaMgSi₂O₆

Pyroxene Group

Chain Silicate

Monoclinic

Question 25

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Answer 25

Hedenbergite CaFeSi₂O₆ Pyroxene Group Chain Silicate Monoclinic

Question 26

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Answer 26

Augite (Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆] Pyroxene Group Monoclinic Chain Silicate

Question 27

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Answer 27

Aegirine NaFeSi₂O₆ Pyroxene Group Chain Silicates Monoclinic

Question 28

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Answer 28

Jadeite [Jade] NaAlSi₂O₆ Pyroxene Group Chain Silicates Monoclinic

Question 29

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Answer 29

Wollastonite CaSiO₃ Wollastonite Group Chain Silicates Triclinic

Question 30

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Answer 30

Tremolite (can also be green or pink) {Ca₂}{Mg₅}(Si₈O₂₂)(OH)₂ Monoclinic Amphibole Group Chain Silicate

Question 31

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Answer 31

Actinolite {Ca₂}{Mg_4.5-2.5Fe_0.5-2.5}(Si₈O₂₂)(OH)₂ Monoclinic Amphibole Group Chain Silicate

Question 32

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Answer 32

Hornblende Ca₂(Me, Fe, Al)₅(Al,Si)₈O₂₂(OH)₂ Amphibole Group Chain Silicate Monoclinic

Question 33

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Answer 33

Glaucophane [Na₂][Mg₃Al₂]Si₈O₂₂(OH)₂ Monoclinic Amphibole Group Chain Silicates

Question 34

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Answer 34

Monazite (Ce, La)PO₄ Monazite Group Phosphates Monoclinic

Question 35

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Answer 35

Muscovite KAl₃Si₃O₁₀(OH)₂ Mica Group Sheet Silicates Monoclinic

Question 36

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Answer 36

Annite KFe²⁺₃(AlSi₃O₁₀)(OH)₂ Mica Group Monoclinic Sheet Silicates

Question 37

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Answer 37

Phlogopite KMg₃(AlSi₃O₁₀)(OH,F)₂ Mica Group Sheet Silicates Monoclinic

Question 38

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Answer 38

Chlorite (may be green, teal, or black) (Mg, Fe)₃(Si,Al)₄O₁₀(OH)₂(Mg,Fe)₃(OH)₆ Phyllosilicate Monoclinic Chlorite Group

Question 39

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Answer 39

Chrysotile Mg₃(Si₂O₅)(OH)₄ Phyllosilicates Monoclinic Kaolinite Group

Question 40

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Answer 40

Talc Mg₃Si₄O₁₀(OH)₂ Triclinic Silica Group Phyllosilicate

Question 41

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Answer 41

Prehnite Ca₂Al₂Si₃O₁₀(OH)₂ Orthorhombic Phyllosilicate Silica Group

Question 42

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Answer 42

Orthoclase KAlSi₃O₈ Monoclinic Tectosilicate Feldspar Group

Question 43

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Answer 43

Microcline (can also be green and pink) KAlSi₃O₈ Triclinic Tectosilicate Feldspar Group

Question 44

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Answer 44

Sanidine KAlSi₃O₈ Monoclinic Tectosilicate Feldspar Group

Question 45

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Answer 45

Albite NaAlSi₃O₈ Triclinic Feldspar Group Tectosilicates

Question 46

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Answer 46

Anorthite CaAl₂Si₂O₈ Triclinic Feldspar Group Tectosilicate

Question 47

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Answer 47

Leucite K(AlSi₂O₆) Tetragonal Zeolite Group Tectosilicate

Question 48

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Answer 48

Nepheline (Na, K)AlSiO₄ Hexagonal Nepheline Group Tectosilicate

Question 49

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Answer 49

Analcime Na₂(Al₂Si₄O₁₂) 2H₂O Triclinic Zeolite Group Tectosilicate

Question 50

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Answer 50

Stilbite NaCa₄[Al₉Si₂₇O₇₂] nH₂O Monoclinic Zeolite Group Tectosilicate