Jewel__A_Celebration_of_Earth_s_Treasures

Rose quartz crystals | Crystals of rose

quartz are exceedingly rare. Here, a group of

crystals up to 1cm (^1 ⁄ 2 in) in length surmount

massive rose quartz.

Hawk’s eye rough | Hawk’s eye is the

mineral crocidolite saturated with quartz.

In this variety the crocidolite is not oxidized;

the oxidized variety is known as tiger’s eye.

Natural citrine | Much of the “citrine”

quartz variety in the marketplace today is

heat-treated amethyst. This Brazilian crystal

is totally natural, and shows some water wear.

Cat’s eye quartz rough | The parallel

needles of another mineral that create the

“eye” when cut en cabochon can be seen in

this piece of cat’s eye quartz rough.

Rock crystal | This stunning group of perfectly formed

quartz rock crystals originates from the state of Arkansas,

USA. It is large at 13cm (5in) in height and also features

a base of tiny quartz crystals.

Rutilated quartz | This quartz crystal is

shot through with needle-like crystals of the

titanium mineral rutile. Quartz can also have

black-to-green needles of tourmaline.

Rock crystal rough | This well-formed

crystal is internally flawless, and is suitable

for cutting into gems, carving, or being sliced

into oscillator plates for electronics.

Namibian quartz | Quartz specimens

from different localities all bear the same

characteristic internal structure. This piece

originates from Namibia.

Milky quartz | Long disregarded for its lack

of clarity, translucent to opaque milky quartz

has, in recent years, become highly valued

by gem cutters and New Age collectors.

Termination

face

Colour

gradation

Flawless interior

Parallel

inclusions

Prism face

Small crystals

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