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Correl > Day 2 Highlighted Parts > Flashcards

Day 2 Highlighted Parts Flashcards

1
Q

Chemically pure and optically colorless variety of calcite

A

Iceland spar

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2
Q

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

A

Travertine of tufa

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3
Q

Compact and cryptocrystalline magnesite may be associated with

A

Opaline silica

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4
Q

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

A

Cleavable magnesite

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5
Q

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

A

Clay ironstone

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6
Q

Siderite is also found in shales and coal measures as:

A

Blackband ore

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7
Q

Yellow variety of smithsonite

A

Turkey-fat ore

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8
Q

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

A

Aragonite (CaCO3)

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9
Q

Gives a yellowish-green flame test

A

Witherite (BaCO3), Barite (BaSO4)

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10
Q

Gives a crimson flame test

A

Strontianite (SrCO3), Celestite (SrSO4)

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11
Q

Shape of dolomite crystals that are strongly curved

A

saddle-shaped

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12
Q

Ankerite becomes yellowish brown due to

A

iron oxidation

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13
Q

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

A

crested barite, barite roses

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14
Q

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

A

Galena (PbS)

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15
Q

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

A

Anhydrite (CaSO4)

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16
Q

Fibrous gypsum with silky luster

A

Satin spar

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17
Q

Fine-grained massive variety of gypsum

A

Alabaster

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18
Q

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

A

Selenite

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19
Q

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

A

Scheelite (CaWO4)

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20
Q

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

A

Collophane

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21
Q

Phosphate materials of bones and teeth are members of the __________

A

Apatite group

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22
Q

Gives a diagnostic red coloring

A

Amblygonite

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23
Q

Ruby red in transparent crystals variety of cuprite

A

Ruby copper

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24
Q

Red gem corundum

A

Ruby

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25
Q

Gem corundum of any other color

A

Sapphire

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26
Q

Black granular corundum; forms when magnetite is intergrown with corundum

A

Emery

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27
Q

Micaceous and foliated hematite

A

Specular hematite

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28
Q

Red earthy variety of hematite

A

Red ocher

29
Q

Platy and metallic variety of hematite

A

Specularite

30
Q

Coarsely crystalline variation of pyrolusite with 6-6.5 hardness

A

Polianite

31
Q

Most common manganese ore mineral

A

Pyrolusite

32
Q

Reniform with radiating fibrous appearance variation of cassiterite

A

Wood tin

33
Q

Cassiterite variety that occurs as rolled pebbles in placer deposits

A

Stream tin

34
Q

Massive or botryoidal form with a banded structure variety of uraninite

A

Pitchblende

35
Q

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

A

Uraninite (UO2)

36
Q

Magnetite variety which may act as a natural magnet

A

Lodestone

37
Q

Characterized by its strong magnetism

A

Magnetite (Fe3O4)

38
Q

This mineral commonly alters to pyrolusite

A

Manganite (MnO(OH))

39
Q

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

A

Psilomelane

40
Q

Generally loose and porous goethite

A

Bog ore

41
Q

Constitutes the gossan or “iron hat” over metalliferous vein deposits

A

Goethite (FeO(OH))

42
Q

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

A

Limonite

43
Q

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

A

Diaspore, Gibbsite, Boehmite

44
Q

Major ore of aluminum

A

Bauxite

45
Q

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

A

Laterite

46
Q

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

A

Hopper-shaped

47
Q

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

A

Rock salt

48
Q

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

A

Salt domes

49
Q

Characterized by its salty taste and yellow flame color

A

Halite

50
Q

May show fluorescence under ultraviolet radiation

A

Fluorite (CaF2)

51
Q

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

A

Gold (Au)

52
Q

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

A

Native silver

53
Q

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.

A

Bort

54
Q

Black or grayish-black bort

A

Carbonado or carbon

55
Q

The primary occurrence of diamonds is in altered peridotites called

A

Kimberlite

56
Q

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

A

Diamond pipes

57
Q

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

A

Placers

58
Q

Synthetic diamond simulant

A

Cubic zirconia

59
Q

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

A

Porphyrytic

60
Q

Tarnished to variegated purple and blue mineral

A

Peacock ore

61
Q

Red variety of sphalerite

A

Ruby zinc

62
Q

Most common mineral ore of zinc

A

Sphalerite (ZnS)

63
Q

Major ore mineral for nickel

A

Pentlandite (Fe,Ni)9S8

64
Q

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

A

dimethylglioxime

65
Q

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

A

Realgar (As4S4)

66
Q

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

A

Orpiment (As2S3)

67
Q

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

A

gossan

68
Q

Most common mineral containing arsenic

A

Arsenopyrite (FeAsS)

Correl (18 decks)

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