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Gemstones

Twelve species, grouped the way the trade groups them. Every page covers colour, commercial sizes, quality considerations, how the species is normally treated, and the formats it is supplied in.

3 species

Precious

Close view of a cushion-cut blue sapphire, filling the frame, with strong blue saturation and bright facet flashes.

Sapphires

1 species

Tourmaline

Loose faceted tourmalines scattered on white — greens, pinks, reds and warm peach tones across mixed shapes and sizes.

Tourmalines

8 species

Fine Coloured Stones

Spinels spaced on a white ground in lavender, steel grey, mauve and pink, mostly round brilliants with a pink pear-cut stone at the centre.

Spinels

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