Name of Gem - Hardness - Ease of Setting
Easiest Difficult
Diamond - 10 - 1
Ruby - 9 - 1
Sapphire - 9 - 1
Alexandrite - 8.5 - 3
Topaz - 8 - 2 =>3
Spinel - 8 - 4
Blue Topaz - 8 - 3
Emerald - 7.5 ó 8 - 10
Andalusite - 7.5 - 4
Aquamarine - 7.5 ó 8 - 4
Iolite - 7 ó 7.5 - 5
Smokey Quartz - 7 - 5
Amethyst - 7 - 5
Tourmaline - 7 ó 7.5 - 5
Citrine - 7 - 4
Garnet - 6.5 ó 7.5 - 4
Onyx - 6.5 ó 7 - 3
Tiger Eye - 6.5 ó 7 - 3
Zircon - 6.5 ó 7.5 - 3
Bloodstone - 6.5 ó 7 - 3=>4
Tanzanite - 6.5 ó 7 - 3
Peridot - 6.5 ó 7 - 4=>5
Moonstone - 6 ó 6.5 - 5
Hematite - 5.5 <> 6.5 - 6
Fire Opal - 5.5 ó 6.5 - 8
Opal - 5.5 ó 6.5 - 8
Lapis Lazuli - 5 ó 6 - 9
Turquoise - 5 ó 6 - 9
Malachite - 3.5 ó 4 - 8
Coral - 3 ó 4 - 10
Pearl - 2.5 ó 4.5 - 10
Amber - 2 ó 2.5 - 10
=====================
The “Rating of Ease of Setting” is my own numbering system. Other setters might disagree with me, but I’m satisfied with my own rating.