Two gemstones.
Side by side.

GEMSTONE ONE

Mottramite

Mottramite: Olive-coloured botryoidal crusts or earthy aggregates in oxidised ore. A concise guide to properties, responsible collecting, provenance and care.

Colour & appearance

Olive green, yellow-green to very dark brown

Mineral family

Lead copper vanadate hydroxide; adelite-descloizite group

Mohs hardness

3–3.5

Representative source regions

United Kingdom; Namibia; Australia

United Kingdom Namibia Australia

Jewellery & care

Lead-bearing collector material; avoid wearing, dust and untreated handling by children. Strong colours and a specimen’s mineralogical interest do not make it a commercially graded facetable gemstone.

GreenBrown

Read the Mottramite 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.