Corindons - Pierres précieuses - Brochier Vulliod

The Corundums

Density: 4.0

Hardness: 9

Varieties: Ruby, Sapphire – Blue, Yellow, Pink, Green

Beryls - Pierres précieuses - Brochier Vulliod

The Beryls

Density: 2.7 to 7.5

Hardness: 7 to 7.5

Varieties: Emerald, Aquamarine – blue to light blue, Morganite – pink, Heliodorus – yellow, Goshenite – colorless.

Chrysobéryls - Pierres précieuses - Brochier Vulliod

The Chrysoberyls

Density: 3.7

Hardness: 8.5

Varieties: Chrysoberyl, Alexandrite, Cat’s eye

Grenat - Pierres précieuses - Brochier Vulliod

The Garnets

Density: 3.6 to 4.2

Hardness : 6.5 – 7.5

Varieties: Pyrope – dark red, Almandine – dark red, Grossular – all colors, Spassartite – orange red, Andratite – green to black, Uvarovite – green

Quartz - Pierres précieuses - Brochier Vulliod

The Quartz

Density: 2.65

Hardness : 7

Varieties: Smoky Quartz – light to dark brown, Citrine – yellow, Rock Crystal – colorless, Amethyst – purple

Tourmailines - Pierres précieuses - Brochier Vulliod

The Tourmalines

Density: 3.0 to 3.2

Hardness: 7 – 7.5

Varieties: Rubellite – pink, Dravite – black, Elbaite – pink

Spinelles - Pierres précieuses - Brochier Vulliod

The Spinels

Density: 3.6

Hardness: 7.5 to 8

Peridot - Pierres précieuses - Brochier Vulliod

The Peridots

Density: 3.3 to 3.5

Hardness : 8

Zircon - Pierres précieuses - Brochier Vulliod

Zircons

Density: 3.9 to 4.7

Hardness : 7.5

Zoiste - Pierres précieuses - Brochier Vulliod

The Zoists

Density: 3.35

Hardness: 6.5 to 7

Varieties: Tanzanite – blue/purple, Thuilite – pink, Aryolite – green