Two gemstones.
Side by side.

GEMSTONE ONE

Ammolite

Ammolite: A delicate rainbow-like sheen that travels across a polished fossil ammonite shell, sometimes following its chambered spiral. Discover properties, identificatio...

Colour & appearance

Iridescent red, green, gold, blue and violet

Mineral family

Organic gem material: fossil ammonite shell with aragonite

Mohs hardness

3.5–4 (shell material; variable)

Representative source regions

Alberta, Canada; other iridescent fossil-ammonite material also occurs elsewhere

Canada

Jewellery & care

Suitable for carefully protected pendants, earrings and display; vulnerable in exposed rings and daily abrasion. Assemblies may use harder protective layers.

RedGreenBlueViolet

Read the Ammolite 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.