GIA Colored Stones Exam 701-747

Question 1

What is Myanmar’s most important gem export?

Answer 1

ruby

Question 2

Which location produces the majority of rubies that end up in mass_produced jewelry?

Answer 2

Mong Hsu

Question 3

What is the trade term that describes a mixture of gem qualities that represents unsorted production from a particular mine?

Answer 3

mine run

Question 4

What term describes a specific rough gemstone quality range; usually determined by color; size; clarity; and price?

Answer 4

grade

Question 5

Where is rough from Mogok brought into Thailand?

Answer 5

Mae Sot

Question 6

Where is rough from Mong Hsu brought into Thailand?

Answer 6

Mae Sai

Question 7

In mining terms; the theft of a mine’s production by its workers is known as __________.

Answer 7

high grading

Question 8

A quantity of stones; sometimes of similar size and quality; from a single mine or from many different sources is called ___________.

Answer 8

parcel

Question 9

What is the main cutting center in Thailand?

Answer 9

Chantaburi

Question 10

Materials cut free_size are usually __________.

Answer 10

large important stones

Question 11

Gemstone sizes cut to fit standard mountings are known as ________.

Answer 11

calibrated sizes

Question 12

The market sector where better_quality gemstones are used in well_finished; moderately priced jewelry is known as the _____________.

Answer 12

middle market

Question 13

What term describes a random sample from a parcel of gemstones often used to access the parcel’s overall quality?

Answer 13

cut

Question 14

What is the term for buying an entire parcel of gems; or a substantial part of it?

Answer 14

Lot price

Question 15

What is the term for a premium price for selecting stones from a parcel?

Answer 15

pick price

Question 16

Aragonite is a crystallized form of ___________.

Answer 16

calcium carbonate

Question 17

What year did Kokichi Mikimoto begun culturing whole pearls?

Answer 17

1908

Question 18

What industry directly contributed to the decline of the natural pearl industry?

Answer 18

oil

Question 19

The first South Sea cultured pearl farm was founded in what country?

Answer 19

Australia

Question 20

Saltwater whole cultured pearls grow from a ____________.

Answer 20

Mantle_tissue piece and a bead nucleus.

Question 21

A great majority of freshwater whold cultured pearls grow from a ___________.

Answer 21

mantle_tissue piece only

Question 22

In the early 1990’s; oysters in many important Japanese cultured pearl farming areas began to ____________.

Answer 22

die off massively in large numbers

Question 23

The four major types of whole pearls are ______; ________; __________ and ________.

Answer 23

Akoya; South Sea; freshwater; Tahitian

Question 24

South Sea cultured pearls are produced principally in Australia; Indonesia and the __________.

Answer 24

Philippines

Question 25

The oyster used to grow Tahitian cultured pearls is _____________.

Answer 25

Pinctada margaritifera

Question 26

The nacreous layer inside a pearl_bearing mollusk's shell is called ___________.

Answer 26

mother_of_pearl

Question 27

What country produces the most freshwater cultured pearls?

Answer 27

China

Question 28

A number of similar cultured pearl strands bundled together is called a ___________.

Answer 28

hank

Question 29

Seed pearls are _________.

Answer 29

very small natural pearls

Question 30

Common name for the Pinctada fucata oyster and the natural or cultured pearls it produces.

Answer 30

Akoya

Question 31

A crystallized form of calcium carbonate found in nacre.

Answer 31

Aragonite

Question 32

A bead used as the core of a cultured pearl; usually made from a freshwater mussel shell.

Answer 32

bead nucleus

Question 33

A non_nacreous natural "pearl"

Answer 33

Calcareous concretion

Question 34

The organic "glue" in nacre that holds aragonite platelets together.

Answer 34

Conchiolin

Question 35

A cultured pearl grown around a nucleus glued under the mantle tissue inside a mollusk's shell.

Answer 35

cultured blister_pearl

Question 36

A pearl formed as the result of human intervention in the formation process.

Answer 36

cultured pearl

Question 37

The reproductive organ that produces eggs in females and sperm in males.

Answer 37

gonad

Question 38

Describes mollusks bred in laboratory tanks and grown in protected areas rather than collected as adults in the wild.

Answer 38

hatchery_bred

Question 39

An assembly composed of a nacre dome; filler; and a mother_of_pearl backing.

Answer 39

Mabe'

Question 40

The organ that lines the mollusk's shell encloses its soft body; and contains the cells that form pearl sacs and secrete nacre.

Answer 40

Mantle

Question 41

A small square of mantle tissue cut from a donor mollusk and implanted in a host mollusk with or without a bead.

Answer 41

mantle_tissue piece

Question 42

The nacreous layer inside a pearl_bearing mollusk's shell.

Answer 42

mother_of_pearl

Question 43

A natural substance produced by pearl_bearing mollusks to make pearls.

Answer 43

nacre

Question 44

Tissue that encloses an implanted bead nucleous and mantle_tissue piece; or the piece alone; and secretes nacre to form a cultured pearl.

Answer 44

pearl sac

Question 45

A company that prepares cultured pearls for the market.

Answer 45

processor

Question 46

Chinese freshwater cultured pearls shaped and textured like rice grains.

Answer 46

rice pearls

Question 47

What country produces an overwhelming majority of the world's freshwater cultured pearls.

Answer 47

China

Question 48

Produced by; or derived from; a living organism is called ____________.

Answer 48

organic

Question 49

A natural material composed of masses of mineral crystals of one or more kinds is called a _________.

Answer 49

rock

Question 50

A mineral that contains the elements silicon and oxygen is called a __________.

Answer 50

silicate