Two gemstones.
Side by side.

GEMSTONE ONE

Cookeite

Cookeite ((LiAl₄□)[AlSi₃O₁₀](OH)₈), Mohs 2.5–3.5: an illustrated guide to crystal habit, identification, origins, collecting and safe care.

Colour & appearance

White, pale pink, lilac, greenish, yellowish

Mineral family

Lithium-bearing chlorite-group phyllosilicate

Mohs hardness

2.5–3.5

Representative source regions

United States; Brazil; Portugal

United States Brazil Portugal

Jewellery & care

Soft, flaky cookeite is mainly a display mineral; it is unsuitable for rings or frequently touched jewelry. The GemHood picture is a generated educational illustration; it is not an authenticated specimen, laboratory result or sal...

WhitePinkLilac

Read the Cookeite guide

GEMSTONE TWO

Sapphire

Sapphire is a gem variety of corundum, often associated with blue but also found in other colours. Its hardness makes it an enduring jewellery material, although the secu...

Colour & appearance

Blue and other colours

Mineral family

Corundum (Al₂O₃)

Mohs hardness

9

Representative source regions

Sri Lanka, Madagascar, Myanmar, Australia, Thailand and Montana in the United States are recognised sources. The Kashmir region is historically famous for highly valued blue sapphires.

Sri Lanka Madagascar Myanmar Australia Thailand United States

Jewellery & care

Choose the style and setting to suit the specific stone, treatment information and intended use.

Blue

Read the Sapphire guide

Hardness measures scratch resistance, not breakage. Source regions are educational examples, not claims about the provenance of an individual GEMHOOD product. Images may be digital gemstone illustrations.