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Colored Stone Essentials > Assignment 1 > Flashcards

Assignment 1 Flashcards

0
Q

Kinds and relative quantities of atoms that make up material

A

Chemical composition

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1
Q

Lackin a regular crystal structure

A

Amorphous

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2
Q

Written description of a material’s chemical makeup

A

Chemical formula

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3
Q

Any gem material other than diamond

A

Colored stone

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4
Q

Regular, repeating internal arrangement of atoms in a material

A

Crystal structure

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5
Q

I gemstone’s ability to withstand wear, heat, and chemicals

A

Durability

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6
Q

A US government agency that issues guidelines for the jewelry trade

A

Federal trade commission FTC

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7
Q

The study of gems

A

Gemology

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8
Q

A broad gem category based on chemical composition and crystal structure

A

Gem species

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9
Q

A subcategory of species, based on color, transparency, or phenomenon

A

Gem variety

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10
Q

A family of gem from several closely related mineral species

A

Group

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11
Q

How well a gemstone resists scratches and abrasion

A

Hardness

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12
Q

Composed of, or arising from, non-living matter

A

Inorganic

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13
Q

The appearance of a material’s surface in reflected light

A

Luster

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14
Q

A natural, inorganic substance with a characteristic chemical composition and usually characteristic structure

A

Mineral

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15
Q

Gems produced by natural processes, without human help

A

Natural gems

16
Q

Once living, or produced by a living organism (plant or animal)

A

Organic

17
Q

An usual optical effect displayed by a gem

A

Phenomenon

18
Q

How well I gemstone resists the effects of light, heat, and chemicals

A

Stability

19
Q

A laboratory creation with essentially the same chemical composition, crystal structure, and properties as its natural counterpart

A

Synthetic gem

20
Q

How well a gemstone resists breaking, chipping, and cracking

A

Toughness

21
Q

Atoms in a gem that aren’t part of its essential chemical composition

A

Trace elements

22
Q

Degree to which a material allows light to pass through it

A

Transparency

Colored Stone Essentials (4 decks)

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