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MINERALOGY > Cyclosilicate > Flashcards

Cyclosilicate Flashcards

1
Q

Also called as ring silicates

A

Cyclosilicates

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2
Q

This ring element has the formula (Si3O9)

A

Triangular ring shape

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3
Q

Ring silicates that forms a shape of a square.

A

Si4O12

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4
Q

Ring silicates that forms a hexagonal ring elements

A

Si6O18

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5
Q

BaTi (Si3O9)

A

BENITOITE

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6
Q

Color of benitoite

A

Light blue to indigo blue

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7
Q

Distinguishing feature of benitoine

A

Fluorescent and displays pleochroism

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8
Q

Ba(Sn,Ti)(Si3O9)

A

Pabastite

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9
Q

Distinguishing features of pabastite

A

Fluorescent (bluish white in short-wave UV light)

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10
Q

Pb (Ca,Mn)2 (Si3O9)

A

Margarosanite

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11
Q

Crystal system and Distinguishing Feature of margarosanite

A

Triclinic // displays a bluish white fluorescence in short- wave UV light.

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12
Q

Well known six membered ring silicates

A

Tourmaline group

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13
Q

formed by hydrothermal activity, a process that carries hot water and vapours along with the necessary elements to form crystals in pockets, cavities, fractures, fissures, or any open space in igneous and/or metaphoric rock where crystal growth can occur.

A

Tourmalines

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14
Q

REFERS TO THE PROPERTY OF THE MINERAL TO CHANGE COLOURS IN CORRELATION WITH THE PATH LENGTH THAT THE LIGHT TRAVELS THROUGH THE MATERIAL

A

Usambara effect

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15
Q

Na Mag3 (Al)6 (Si6O18) (BO3)3 (OH)4

A

Dravite

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16
Q

Brown tourmaline

A

Dravite

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17
Q

Crystal system in tourmaline group

A

Trigonal

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18
Q

The brown tourmaline displays an

A

Usambara Effect

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19
Q

Na Fe3 (Al)6 (Si6O18) (BO3)3 (OH)4

A

Schorl

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20
Q

Black tourmaline

A

Schorl

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21
Q

Formula: Na (Li, Al)3 (Al)6 (Si6O18) (BO3)3 (OH)4

Color: Usually bicolored

A

Elbaite

22
Q

Watermelon tourmaline

A

Elbaite

23
Q

Purple and opaque variety of elbaite

A

Siberite

24
Q

Cu-bearing and electric blue variety of elbaite

A

Paraiba

25
Q

Formula: Na (Li, Al)3 (Al)6 (Si6O18) (BO3)3 (OH)4

Color: Green

A

Verdelite

26
Q

Green tourmaline

A

Verdelite

27
Q

Ca (Li, Al)3 (Al)6 (Si6O18) (BO3)3 (OH)4

A

Liddicoatite

28
Q

Type of tourmaline that showcases Triangularly-Banded pattern when cut

A

Liddicoatite

29
Q

Formula: Na ( Li, Al)3 (Al)6 (Si6O18) (BO3)3 (OH)4

Color: Blue, Greenish-Blue, Blue-Green

A

Indicolite

30
Q

Brazillian sapphire

A

Indicolite

31
Q

Specific color of indicolite

A

Saturated vibrant blue

32
Q

Formula:
Na (Li,Al)3 (Al)6 (Si6O18) (BO3)3 (OH)4

Color: vivid pink

A

Rubellite

33
Q

Alias of rebellite

A

Aphrite

34
Q

(Mg,Fe)2 Al3 (Al) (Si5O18)

A

Cordierite

35
Q

Crystl system of cordierite

A

Orthorhombic

36
Q

Distinguishing feature of codierite

A

Pleochroic property

37
Q

Transparent var of cordierite

A

Iolite

38
Q

Be3 Al2 (Si6O18)

A

Beryl

39
Q

Distinguishing ft of beryl

A

Allochromatic

40
Q

Crystal system of beryl

A

Hexagonal

41
Q

Purest var of beryl

A

Goshenite

42
Q

Green var and cr-rich beryl

A

Emerald

43
Q

Blue green var and Fe-rich of beryl

A

Aquamarine

44
Q

Mg- rich and pink var of beryl

A

Morganite

45
Q

Fe-rich and yellow var beryl

A

Heliodor

46
Q

Raspberry pink and Mn-rich baryl

A

Red beryl

47
Q

K Na2 Fe2Li3 (Si12 O30)

A

Sugilite

48
Q

Six membered ring that Can exhibit unique inclusions, banding, or patterns that are specific to this gemstone.

A

Sugilite

49
Q

CuSiO3 *H2O

A

Dioptase

50
Q

Exceptional transparency. When cut and polished, can exhibit a glass-like luster

A

Dioptase

51
Q

transparent gem variety of Cordierite

A

Iolite

MINERALOGY (22 decks)

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