Day 2 Highlighted Parts

Question 1

Chemically pure and optically colorless variety of calcite

Answer 1

Iceland spar

Question 2

Cellular deposits formed around hot or cold calcareous springs are known as

Answer 2

Travertine of tufa

Question 3

Compact and cryptocrystalline magnesite may be associated with

Answer 3

Opaline silica

Question 4

Magnesite found in talc, chlorite, mica schists, and in dolomitic limestones

Answer 4

Cleavable magnesite

Question 5

Siderite also occurs as ___________, with admixed clay minerals, in concretions with concentric layers.

Answer 5

Clay ironstone

Question 6

Siderite is also found in shales and coal measures as:

Answer 6

Blackband ore

Question 7

Yellow variety of smithsonite

Answer 7

Turkey-fat ore

Question 8

The orthorhombic polymorph of calcite; the pearly layer of many shells and the pearl itself

Answer 8

Aragonite (CaCO3)

Question 9

Gives a yellowish-green flame test

Answer 9

Witherite (BaCO3), Barite (BaSO4)

Question 10

Gives a crimson flame test

Answer 10

Strontianite (SrCO3), Celestite (SrSO4)

Question 11

Shape of dolomite crystals that are strongly curved

Answer 11

saddle-shaped

Question 12

Ankerite becomes yellowish brown due to

Answer 12

iron oxidation

Question 13

Barite forms frequently in divergent groups or tabular crystals forming _________ or __________

Answer 13

crested barite, barite roses

Question 14

Anglesite (PbSO4) frequently occur as earthy, in concentric layers that may have an unaltered core of which mineral?

Answer 14

Galena (PbS)

Question 15

Found in much the same manner as gypsum, but is less common than gypsum

Answer 15

Anhydrite (CaSO4)

Question 16

Fibrous gypsum with silky luster

Answer 16

Satin spar

Question 17

Fine-grained massive variety of gypsum

Answer 17

Alabaster

Question 18

Gypsum variety that yields broad, colorless, and transparent cleavage folia

Answer 18

Selenite

Question 19

Most of these mineral will fluoresce with bluish-white color in short ultraviolet radiation

Answer 19

Scheelite (CaWO4)

Question 20

Massive, cryptocrystalline variety of apatite, constituting the bulk of phosphorite or phosphate rock

Answer 20

Collophane

Question 21

Phosphate materials of bones and teeth are members of the __________

Answer 21

Apatite group

Question 22

Gives a diagnostic red coloring

Answer 22

Amblygonite

Question 23

Ruby red in transparent crystals variety of cuprite

Answer 23

Ruby copper

Question 24

Red gem corundum

Answer 24

Ruby

Question 25

Gem corundum of any other color

Answer 25

Sapphire

Question 26

Black granular corundum; forms when magnetite is intergrown with corundum

Answer 26

Emery

Question 27

Micaceous and foliated hematite

Answer 27

Specular hematite

Question 28

Red earthy variety of hematite

Answer 28

Red ocher

Question 29

Platy and metallic variety of hematite

Answer 29

Specularite

Question 30

Coarsely crystalline variation of pyrolusite with 6-6.5 hardness

Answer 30

Polianite

Question 31

Most common manganese ore mineral

Answer 31

Pyrolusite

Question 32

Reniform with radiating fibrous appearance variation of cassiterite

Answer 32

Wood tin

Question 33

Cassiterite variety that occurs as rolled pebbles in placer deposits

Answer 33

Stream tin

Question 34

Massive or botryoidal form with a banded structure variety of uraninite

Answer 34

Pitchblende

Question 35

Characterized by strong radioactivity (as detected by a Geiger counter or scintillation counter).

Answer 35

Uraninite (UO2)

Question 36

Magnetite variety which may act as a natural magnet

Answer 36

Lodestone

Question 37

Characterized by its strong magnetism

Answer 37

Magnetite (Fe3O4)

Question 38

This mineral commonly alters to pyrolusite

Answer 38

Manganite (MnO(OH))

Question 39

Hard botryoidal masses formerly called ____________ are mixtures of mangangese oxides of with romanechite is a major contritutent

Answer 39

Psilomelane

Question 40

Generally loose and porous goethite

Answer 40

Bog ore

Question 41

Constitutes the gossan or "iron hat" over metalliferous vein deposits

Answer 41

Goethite (FeO(OH))

Question 42

Term used for very fine-grained to amorphous mixtures of brown ferric hydroxides whose real identities are unknown

Answer 42

Limonite

Question 43

Bauxite consists of very fine-grained intergrowth of three aluminum hydroxides namely:

Answer 43

Diaspore, Gibbsite, Boehmite

Question 44

Major ore of aluminum

Answer 44

Bauxite

Question 45

Formed in the tropics, is a soil consisting mainly of hydrous aluminum and ferric oxides

Answer 45

Laterite

Question 46

Term used to describe the shape of a halite when the faces of the cube have grown more at the edges than in the center

Answer 46

Hopper-shaped

Question 47

Halite crystals or granular crystalline masses showing cubic cleavage is known as

Answer 47

Rock salt

Question 48

Valuable deposits found in intrusive masses, in which their roots are in thick, bedded deposits

Answer 48

Salt domes

Question 49

Characterized by its salty taste and yellow flame color

Answer 49

Halite

Question 50

May show fluorescence under ultraviolet radiation

Answer 50

Fluorite (CaF2)

Question 51

Forming chalcocite blankets at the level of the water table in enriched zones of sulfide deposits

Answer 51

Gold (Au)

Question 52

___________ in large deposits has been precipitated from primary hydrothermal solutions.

Answer 52

Native silver

Question 53

A diamond variety with rounded forms and rough exterior resulting from radial or cryptocrystalline aggregate. Term is also applied to badly colored or flawed diamonds without gem value.

Answer 53

Bort

Question 54

Black or grayish-black bort

Answer 54

Carbonado or carbon

Question 55

The primary occurrence of diamonds is in altered peridotites called

Answer 55

Kimberlite

Question 56

Intrusive bodies that are commonly circular with a pipe-like shape is referred to as

Answer 56

Diamond pipes

Question 57

An area where a large percentage of diamonds are recovered from alluvial deposits

Answer 57

Placers

Question 58

Synthetic diamond simulant

Answer 58

Cubic zirconia

Question 59

Term for the texture of an igneous rock in which larger crystals-- phenocrysts-- are set in a finer-grained groundmass

Answer 59

Porphyrytic

Question 60

Tarnished to variegated purple and blue mineral

Answer 60

Peacock ore

Question 61

Red variety of sphalerite

Answer 61

Ruby zinc

Question 62

Most common mineral ore of zinc

Answer 62

Sphalerite (ZnS)

Question 63

Major ore mineral for nickel

Answer 63

Pentlandite (Fe,Ni)9S8

Question 64

The presence of nickel can be quickly established through a scarlet coloration forming in a test using:

Answer 64

dimethylglioxime

Question 65

Occurs as a volcanic sublimation product and as a deposit from hot springs

Answer 65

Realgar (As4S4)

Question 66

A rare mineral often associated with realgar and formed under similar conditions

Answer 66

Orpiment (As2S3)

Question 67

Pyrite veins are usually capped by a cellular deposit of limonite called

Answer 67

gossan

Question 68

Most common mineral containing arsenic

Answer 68

Arsenopyrite (FeAsS)