Two gemstones.
Side by side.

GEMSTONE ONE

Adamite

Adamite is a collectible zinc arsenate mineral whose yellow-green crystals can form glowing sprays. Best for protected display, not jewellery; specimens contain arsenic i...

Colour & appearance

Honey-yellow, pale green, colourless; occasional pink or blue

Mineral family

Zinc arsenate hydroxide (collector mineral)

Mohs hardness

3.5

Representative source regions

Mexico (notably Durango); Greece (Lavrion district).

Mexico Greece

Jewellery & care

Collector display only; soft, brittle arsenate-bearing crystals are unsuitable for routine jewellery.

YellowGreenColourlessBlue

Read the Adamite 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.