Two gemstones.
Side by side.

GEMSTONE ONE

Ajoite

Ajoite is known for fine blue-green sprays and included quartz rather than a dependable transparent cut gemstone. Read the identification, handling and collector-use guid...

Colour & appearance

Turquoise to blue-green

Mineral family

Hydrated copper aluminosilicate

Mohs hardness

Not reliably specified

Representative source regions

United States (Arizona); South Africa

United States South Africa

Jewellery & care

Primarily collector specimens; a host-quartz object must not be sold as pure ajoite.

TurquoiseBlue-green

Read the Ajoite 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.