Tectosilicates

Question 1

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

Answer 1

Quartz

Question 2

SiO2 that has smooth, waxy, or glassy appearance

Answer 2

Chalcedony

Question 3

SiO2 that has tetragonal crystal structure different from quartz and tridymite

Answer 3

Cristobalite

Question 4

SiO2 that has a triclinic crystal system

Answer 4

Tridymite

Question 5

Opal is a

Answer 5

Mineraloid

Question 6

SiO2 nH2O

Answer 6

Opal

Question 7

KAI Si3O8

Answer 7

Potassium feldspar

Question 8

Crystal system of potassium feldpar

Answer 8

Monoclinic

Question 9

Restricted to quartz-free
rocks

Answer 9

Feldspathoid group

Question 10

(Na, K) AlSiO4

Answer 10

Nepheline

Question 11

Crystla system of nepheline

Answer 11

Hexagonal

Question 12

KAl Si2O6

Answer 12

Leucite

Question 13

Commercial source of alum

Answer 13

Leucite

Question 14

Na6 Ca2 Al6 Si6 O24 (CO3)2

Answer 14

Cancrinite

Question 15

Na4 (AlSiO4)3 Cl

Answer 15

Sodalite

Question 16

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

Answer 16

Tenebrescence

Question 17

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

Answer 17

Plagioclase fledspar

Question 18

Crystal system of plagioclase feldspar

Answer 18

Triclinic

Question 19

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

Answer 19

Labradoresence

Question 20

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

Answer 20

Adularescene

Question 21

NaAl Si3O18

Answer 21

Albite

Question 22

Na4Al3 Si9O24 Cl

Answer 22

Marialite

Question 23

Alias of marialite

Answer 23

Mizzonite

Question 24

Crystal system of marialite

Answer 24

Tetragonal

Question 25

Ca4 Al6 Si6O24 CO3

Answer 25

Meionite

Question 26

Na (AlSi2O6) * H2O

Answer 26

Analcime

Question 27

Na2 Al2 Si3O10 * 2(H2O)

Answer 27

Natrolite

Question 28

Ca Al2 Si4O12 *4H2O

Answer 28

Laumontite

Question 29

Stilbite alias

Answer 29

Desmine

Question 30

NaCa4 Al9 Si27O72 * 28(H2O

Answer 30

Stilbite

Question 31

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

Answer 31

Amethyst

Question 32

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

Answer 32

Rose quartz

Question 33

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

Answer 33

Smokey quartz

Question 34

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

Answer 34

Milky quartz

Question 35

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

Answer 35

Pure quartz

Question 36

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

Answer 36

Citrine

Question 37

Purest form of quartz

Answer 37

Alpha quartz

Question 38

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

Answer 38

Morion

Question 39

play of colors which is caused by defraction of white light

Answer 39

Opalescene

Question 40

Composed of microcrystalline quartz or chalcedony

Answer 40

Chert or/and Flint

Question 41

Reddish variety of Chalcedony caused by iron oxide impurities

Answer 41

Carnelian

Question 42

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

Answer 42

Jasper

Question 43

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

Answer 43

Blue Agate

Question 44

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

Answer 44

Sardonyx

Question 45

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

Answer 45

Fire Agate

Question 46

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

Answer 46

Chrysoprase

Question 47

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

Answer 47

Heliotrope

Question 48

Alias of Heliotrope

Answer 48

Bloodstone

Question 49

The colors of Heliotrope green is caused by inclusions of _____________

Answer 49

Chlorite or Amphiboles

Question 50

the red spots of heliotrope are caused by _______________

Answer 50

Iron Oxide or Hematite

Question 51

Light violet to dark purple variety of chalcedony caused by manganese

Answer 51

Damsonite

Question 52

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

Answer 52

Iris Agate