Two gemstones.
Side by side.

GEMSTONE ONE

Legrandite

Legrandite guide: identity, composition Zn₂(AsO₄)(OH)·H₂O, hardness 4.5, origins, collecting and care.

Colour & appearance

Yellow to pale yellow, sometimes colourless

Mineral family

hydrated zinc arsenate mineral

Mohs hardness

4.5

Representative source regions

Mexico; Greece; Namibia

Mexico Greece Namibia

Jewellery & care

Collector-only mineral: its arsenate chemistry and fragile crystals make it inappropriate for jewellery and wellness use.

YellowColourless

Read the Legrandite 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.