Jewel__A_Celebration_of_Earth_s_Treasures

260 SILICATES

Grossular garnet | Grossular garnets are

found in a variety of colours. This example,

cut in a mixed-cut cushion, is near colourless

with a greenish tinge.

Grossular garnet | Grossular garnets

tend to be pink or green, but may be found

in other colours. This crystal in a groundmass

is deep pink-red.

Hessonite garnets | Hessonite, informally referred to

as “cinnamon stone”, is an orange-brown garnet and

one of the varieties of grossular garnet. This specimen

consists of a cluster of vividly-coloured crystals.

Green demantoid | The green of demantoid

andradite garnets varies from yellow-green

to the deep, rich green of this triangular

fancy-cut stone.

Colour-change garnet | Discovered in

Madagascar only in 1990, this garnet

is a mixture of pyrope and spessartine,

and shifts from blue-green to purple.

Rough Varieties

Dodacahedron

hessonite crystals

Demantoid garnet | Faceted in a round

standard brilliant, this demantoid variety

of andradite has a yellowish-tinge to its

otherwise green colouring.

Uvarovite | Green uvarovite garnet

is one of the rarest varieties of the mineral.

Here, uvarovite crystals form a crust on a

rock groundmass.

Demantoid garnet | Demantoid means

“diamond-like”, referring to brilliance. This

stone is a green variety of andradite and is

faceted here with an oval mixed cut.

Grossular brilliant | This flawless, light

green grossular faceted into a classic

round brilliant is cut from rough material

mined in Mali.

Melanite andradite garnet | This

fine crystal of andradite garnet displays

the form of a dodecahedron modified

by an octahedron.

Alamandine in matrix | This specimen

has a number of classic almandine garnet

dodecahedrons embedded in a groundmass

of mica schist.

Grossular garnet Uvarovite crystals

Alamandine Mica schist

garnet crystals

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