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MINERALOGY > Tectosilicates > Flashcards

Tectosilicates Flashcards

1
Q

SiO2 that hexagonal prisms
terminated by a combination of positive and
negative rhombohedrons

A

Quartz

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2
Q

SiO2 that has smooth, waxy, or glassy appearance

A

Chalcedony

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3
Q

SiO2 that has tetragonal crystal structure different from quartz and tridymite

A

Cristobalite

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4
Q

SiO2 that has a triclinic crystal system

A

Tridymite

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5
Q

Opal is a

A

Mineraloid

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6
Q

SiO2 nH2O

A

Opal

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7
Q

KAI Si3O8

A

Potassium feldspar

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8
Q

Crystal system of potassium feldpar

A

Monoclinic

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9
Q

Restricted to quartz-free
rocks

A

Feldspathoid group

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10
Q

(Na, K) AlSiO4

A

Nepheline

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11
Q

Crystla system of nepheline

A

Hexagonal

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12
Q

KAl Si2O6

A

Leucite

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13
Q

Commercial source of alum

A

Leucite

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14
Q

Na6 Ca2 Al6 Si6 O24 (CO3)2

A

Cancrinite

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15
Q

Na4 (AlSiO4)3 Cl

A

Sodalite

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16
Q

mineral changes color in direct
sunlight and turns back into its original
color in the dar

A

Tenebrescence

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17
Q

(Ca, Na) (Al,Si) Al Si2 O8

A

Plagioclase fledspar

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18
Q

Crystal system of plagioclase feldspar

A

Triclinic

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19
Q

effect that causes a mineral to display dark,
metallic-like color shimmers, usually in blue
and green colors

A

Labradoresence

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20
Q

optical effect when a mineral displays a
milky, bluish luster across a mineral’s surface

A

Adularescene

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21
Q

NaAl Si3O18

A

Albite

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22
Q

Na4Al3 Si9O24 Cl

23
Q

Alias of marialite

24
Q

Crystal system of marialite

A

Tetragonal

25
Q

Ca4 Al6 Si6O24 CO3

26
Q

Na (AlSi2O6) * H2O

27
Q

Na2 Al2 Si3O10 * 2(H2O)

28
Q

Ca Al2 Si4O12 *4H2O

A

Laumontite

29
Q

Stilbite alias

30
Q

NaCa4 Al9 Si27O72 * 28(H2O

31
Q

Variety of quartz that Traces of iron is exposed to high energy radiation from
x-rays or gamma rays

32
Q

Type of quartz that the color is caused by dumortierite (fibrous borosilicate) inclusions

A

Rose quartz

33
Q

Type of quartz that the color is caused by the
presence of ALUMINUM and when mineral is irradiated with x-rays or gamma rays

A

Smokey quartz

34
Q

Type of quartz that the fluid inclusions that give a milky white appearance

A

Milky quartz

35
Q

The type of quartz that is clear and
free from impurities and
inclusions

A

Pure quartz

36
Q

Type of quartz that the presence of aluminum or iron is responsible for its color

37
Q

Purest form of quartz

A

Alpha quartz

38
Q

The type of quartz that is Nearly black variety due to exposure to natural radiation

39
Q

play of colors which is caused by defraction of
white light

A

Opalescene

40
Q

Composed of
microcrystalline quartz or
chalcedony

A

Chert or/and Flint

41
Q

Reddish variety of Chalcedony caused by
iron oxide impurities

42
Q

Red variety of chalcedony due to inclusions of
hematite and iron
hydroxides

43
Q

Blue variety of chalcedony that gets its
color from iron,
manganese, or copper
depending on its origin

A

Blue Agate

44
Q

Reddish-brown with black
or white bands variety of chalcedony due to the
presence of iron oxide

45
Q

variety of chalcedony that Has inclusions of geothite
or limonite which produce a
fire-like iridescent effect

A

Fire Agate

46
Q

An apple-green to greenish
variety of Chalceddony caused by tiny
inclusions of Ni-bearing
silicates

A

Chrysoprase

47
Q

A greenish-blue variety of Chalcedony with small
red blood-like spots.

A

Heliotrope

48
Q

Alias of Heliotrope

A

Bloodstone

49
Q

The colors of Heliotrope green is
caused by inclusions of _____________

A

Chlorite or Amphiboles

50
Q

the red spots of heliotrope are
caused by _______________

A

Iron Oxide or Hematite

51
Q

Light violet to dark purple
variety of chalcedony caused by
manganese

52
Q

An iridescent variety of chalcedony
caused by the presence of
a diffraction grating
structure

A

Iris Agate

MINERALOGY (32 decks)

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