Non-Silicates

Question 1

Is used for opaque minerals (and other materials, e.g.. ceramics) to determine the paragenetic relationships between different mineral m phases and their identification.

Often, the same specimen which is viewed using the light microscope can be analyzed using advanced x-ray and ion microprobe techniques.

Answer 1

Reflected Light Microscopy

Question 2

more qualitative art than transmitted light microscopy.

using the features of easily identifiable minerals to constrain the identity of associated unknown minerals.

Answer 2

Reflected Light Microscopy

Question 3

Is the measure of how bright the mineral is in PPL.

Answer 3

Reflectivity

Question 4

Iron Oxide minerals are usually ________ in color.

Answer 4

Gray

Question 5

Sulfide mineral are usually _______ in color.

Answer 5

Yellowish

Question 6

The property of metallic minerals in reflected light in which the mineral pops out more if it is harder than the other.

Answer 6

Optical Hardness

Question 7

the way the mineral changes brightness in PPL as you rotate the stage in reflected light microscopy

Answer 7

Bireflectance

Question 8

changes in mineral colour and intensity under crossed polars as you rotate the stage

Answer 8

Anisotropy

Question 9

glittery faint space nebula- like colours you within a mineral under crossed polars

Answer 9

Internal reflections

Question 10

seen in polished surfaces in reflected light as dark lines and straight sided pits

Answer 10

Cleavage

Question 11

the softer the mineral, the more indented the mineral is.

Answer 11

Hardness

Question 12

Also known as reflected pleochroism.

Answer 12

Bireflectance

Question 13

Transmitted Light : Becke line

Reflected Light : __________ __________

Answer 13

Kalb Line

Question 14

Metallic mineral with the distinctive triangular cleavage pattern.

Answer 14

Galena

Question 15

Metallic mineral with the highest reflectivity.

Answer 15

Gold

Question 16

Metallic mineral with the lowest reflectivity.

Answer 16

Chromite

Question 17

Metallic mineral with the highest hardness.

Answer 17

Pyrite

Question 18

Metallic mineral with the lowest hardness.

Answer 18

Galena

Question 19

Bluish-gray metallic mineral with a strong anisotropy.

Answer 19

Hematite

Question 20

________ specks can be a diagnostic characteristic of the metallic mineral gold.

Answer 20

Red

Question 21

Calcite’s extinction type.

Answer 21

Symmetrical

Question 22

Calcite has varying interference colors of _______ degree

Answer 22

Third

Question 23

Barite’s cleavage exhibit ________ structures.

Answer 23

Cubic

Question 24

_________ is a mineral that can both be viewed in reflected light and transmitted light.

Answer 24

Graphite

Question 25

Extinction type of Apatite.

Answer 25

Parallel

Question 26

Is Spinel an isotropic or anisotropic?

Answer 26

Isotropic

Question 27

The Kalb line goes towards the _________ mineral when the stage is elevated.

Answer 27

Softer

Question 28

True or False Gold is harder than Pyrite.

Answer 28

False

Question 29

Which of the following metallic minerals is not isotropic? hematite gold magnetite galena

Answer 29

Hematite