Gia Blue Sapphire

Front 1

The word Sapphire when used alone refers to which variety of corundum

Back 1

blue

Front 2

Other colors of sapphire are referred to as

Back 2

fancy

Front 3

More consumers buy jewelry adorned with (Which gemstone) than any other colored stone

Back 3

blue sapphire

Front 4

What makes blue sapphire the most appealing of the big 3

Back 4

it's typically the most affordable

Front 5

Sapphire's hardness is __ on the Moh's scale

Back 5

9

Front 6

What jewelry trend in the 1990's contributed to the growing sapphire presence

Back 6

increased demand for platinum

Front 7

The most highly valued blue sapphires are
color
tone
saturation

Back 7

velvety blue to violetish blue
medium to medium dark tones
strong to vivid saturation

Front 8

Which trace elements cause the blue of sapphire

Back 8

iron and titanium

Front 9

Blue sapphires require a growth environment free of what element

Back 9

silicon

Front 10

in it's purest state, what color is corundum

Back 10

colorless

Front 11

Why are basalt-hosted sapphires darker in color than non-basalt sapphires?

Back 11

Higher levels of iron

Front 12

3 regions associated with basalt-hosted sapphire are

Back 12

Cambodia, Thailand and Australia

Front 13

Blue sapphires in Kashmir occur when...

Back 13

marble comes into contact with an intruding pegmatite

Front 14

In Yogo Gulch, Montana where do sapphires originate

Back 14

in a rare type of igneous rock

Front 15

What are the 7 colors that make up blue sapphire's hue range

Back 15

vstgB, gB, vslgB, B, vB, bV, V

Front 16

Which trade term refers to the finest blue sapphire

Back 16

Kashmir

Front 17

The color of Kashmir Sapphires is often referred to as

Back 17

Cornflower blue

Front 18

Kashmir sapphire attributes

Back 18

color: violetish blue to pure blue
tone: medium dark tone
saturation: strong to vivid
inclusions: minute to give a velvety luster and desirable softness & intensify color

Front 19

The color of Burmese sapphires is often referred to as

Back 19

royal blue

Front 20

What quality are Burmese sapphires generally considered

Back 20

very-fine

Front 21

Burmes sapphire attributes

Back 21

color: slightly violetish blue to blue
tone: medium to dark
saturation: moderately strong to vivid
*Blue can be more intense and saturated than Kashmir, but they lack the velvety luster. Might appear somewhat inky under incandescent light

Front 22

"Ceylon" and "Sri Lankan" sapphire attributes

Back 22

color: violetish blue to blue
tone: light to medium light
saturation: slightly grayish to strong
*the light tone means they can return more light to the viewer's eyes. As a result, they tend to have greater brilliance than the darker toned sapphires

Front 23

"Pailin" and "Cambodian" sapphire attributes

Back 23

color: violetish blue to slightly greenish blue
tone: medium to dark
**Look best when fashioned into smaller sizes, so they don't appear too dark.

Front 24

"Kanchuanaburi" sapphire attributes

Back 24

color: blue to slightly greenish blue
tone: light to dark
saturation: less saturated stones typically have a grayish appearance
inclusions: most have minute inclusions that cause a milky appearance
**Similar to Sri Lankan in color but not as brilliant

Front 25

"Thai" sapphire attributes

Back 25

color: violetish blue to slightly greenish blue
tone: medium-dark to dark
**Dark tone often reduces brilliance and conceals saturation and hue. Often described as inky blue or blue-black

Front 26

"Australian" sapphire attributes

Back 26

color: violetish blue to very strongly greenish blue
tone: medium-dark to very dark tone
**Often show strong greenish blue peochroism.
**Dark tones result in a serious reduction of brilliance so they're often described as inky blue

Front 27

Sapphires from which 2 countries are often described as Inky.

Back 27

Thailand and Australia

Front 28

Which sapphires can appear inky under incandescent lighting

Back 28

Burmese

Front 29

Most commercial quality sapphires weigh under

Back 29

5 carats

Front 30

Rough sapphire crystal's most common crystal habit is as a

Back 30

barrel or spindle shaped hexagonal pyramid or bipyramid

Front 31

Finished sapphires often have (Deep or shallow) pavilions

Back 31

deep

Front 32

Fashioned sapphires appear most commonly in which shapes

Back 32

cushion and oval with brilliant cut crowns and step cut pavilions

Front 33

What is a common sapphire characteristic

Back 33

color zoning

Front 34

Fact: Blue sapphires typically have some inclusions but they generally have better clarity than rubies

Back 34

fact

Front 35

Which types of inclusions are found in sapphires (7)

Back 35

silk (Rutile needles), boehmite needles, included crystals, fingerprint inclusions, growth zoning, and color zoning and banding

Front 36

Which inclusions give Kashmir sapphires the velvety appearance

Back 36

extremely fine rutile needles

Front 37

What percent of sapphires is treated in some way

Back 37

95%

Front 38

Which 2 treatments of sapphires is the most common

Back 38

heating and lattice-diffusion

Front 39

Which treatments are used more rarely on sapphires

Back 39

cavity and fracture filling with oil, epoxy resin, glasslike materials or polymers; coating with various substances and dyeing

Front 40

When heated, sapphires from which sources regularly achieve a more desirable color

Back 40

non-basaltic

Front 41

Define Geuda

Back 41

Milky, grayish or brownish corundum that can be treated to a fine blue color

Front 42

Define Dhun

Back 42

Smoky corundum that turns blue when treated