|
Gemstone Stability and Toughness
This chart is designed to help identify your stone's stability and toughness and whether you can steam and / or ultrasonically clean it.
|
Gemstone
|
Toughness
|
Steam
|
Ultrasonic
|
|
Alexandrite
|
excellent
|
yes
|
yes
|
|
Amber
|
poor
|
no
|
no
|
|
Amethyst
|
good
|
no
|
no
|
|
Aquamarine
|
fair
|
no
|
no
|
|
Citrine
|
good
|
no
|
no
|
|
Coral
|
fair
|
no
|
no
|
|
Diamond
|
good
|
yes
|
yes
|
|
Emerald
|
poor
|
no
|
no
|
|
Garnet
|
good
|
no
|
no
|
|
Iolite
|
poor
|
no
|
no
|
|
Lapis Lazuli
|
fair
|
no
|
no
|
|
Opal
|
poor
|
no
|
no
|
|
Pearl
|
poor
|
no
|
no
|
|
Peridot
|
poor
|
no
|
no
|
|
Ruby
|
excellent
|
yes
|
yes
|
|
Sapphire
|
excellent
|
yes
|
yes
|
|
Spinel
|
good
|
yes
|
yes
|
|
Tanzanite
|
poor
|
no
|
no
|
|
Topaz
|
poor
|
no
|
no
|
|
Tourmaline
|
good
|
no
|
no
|
|
Turquoise
|
good
|
no
|
no
|
|
Zircon
|
fair
|
yes
|
yes
|
|
