Jewel__A_Celebration_of_Earth_s_Treasures

QUARTZ 137

Rose quartz | Facet-grade rose quartz

is somewhat cloudy: this 16.34-carat

rectangular cushion cut uses large facets

to emphasize colour rather than brilliance.

Hawk’s eye quartz | The rich blue colour

in hawk’s eye quartz comes from numerous

parallel fibres of the mineral crocidolite

enclosed within it.

Tiger’s eye quartz | Tiger’s eye quartz

contains crocidolite fibres exactly as in

blue hawk’s eye, but in tiger’s eye they

are oxidized to a golden colour.

Cat’s eye quartz | In cat’s eye quartz the

“eye” isn’t as sharp as in other minerals, but

when cut in a high-domed cabochon, as

here, it is still prominent.

Rutilated quartz | Cut in a striking, abstract

shape with angular faces, this stunning specimen

of quartz is shot through with dozens of golden

needles of the titanium mineral rutile.

Pendaloque cut | The cutter of this

splendidly coloured citrine pendaloque has

created a large table facet to expose more

of the interior colour.

Brown smoky quartz | This gem is one

of a pair of briolette-cut gems intended as

earring drops. It is a perfect example of this

type of gem cut.

Free-form citrine | The cut on this

spectacular 60.29-carat citrine is classed

as free-form rather than fancy, in that it has

facets placed at all angles and positions.

Cushion cut | This fancy cut cleverly

combines a mixture of small and large

faces to refract light and lighten the

interior of this smoky quartz.

Unusual faceting

Drill hole

Cloudy interior Numerous “eyes”

Mixed

faces

Large table

facet

Rutile needles

132-139_PRO_Quartz.indd 137 07/06/2016 16:13