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General Information, Facts & Tables
[Gemstone Properties]

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Overview

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The table below lists the colours and hardness of common gemstones.

See Also: Mohs Hardness Scale
 

Gemstones

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Mineral

Colour

Moh's Hardness

Agate

brown, red, blue, green, red

7.0

Amethyst

violet

7.0

Aquamarine

sky blue, greenish blue

7.5

Beryl

green, blue, pink

7.0

Bloodstone

green with red spots

7.0

Chalcedony

all colours

7.0

Citrine

yellow

7.0

Diamond

colourless, various colour tints

10

Emerald

green

7.5

Garnet

red, various colours

Low limit 6.5
High limit 7.25

Jade

green, whitish, mauve, brown

7.0

Lapis lazuli

deep blue

5.5

Malachite

dark green banded

3.5

Moonstone

whitish with blue shimmer

6.0

Onyx

various colours with straight coloured bands

7.0

Opal

black, white, orange-red, rainbow coloured

6.0

Ruby

red

9.0

Sapphire

blue, other colours

9.0

Serpentine

red and green

3.0

Soapstone

white, may be stained with impurities

2.0

Sunstone

whitish-red-brown flecked with golden particles

6.0

Topaz

blue, green, pink, yellow, colourless

8.0

Tourmaline

brown-black, blue, pink, red, violet-red, yellow, green

7.5

Turquoise

greenish-grey, sky blue

6.0

Zircon

all colours

7.5