Flawless Square gem

Flawless Square Gems (AKA FS or FSGs) are the 8th level of gem, and the highest that can be found from monster or chest drops. This is the only type of gem that's found on Inferno (pre-Patch 1.0.4, Square gems also dropped in Inferno), and has thus become the default level of gem when players speak about gem finds or crafting costs.

For instance, it costs 27 Flawless Square Gems to create 1 Star Gem. That level of gem is widely used for item socketing (especially to add stats to armor sockets) as most players find it the best value; higher level gems cost a great deal more for only slight improvements in stats.

Crafting

Though Flawless Square gems are found in Inferno and the later portions of Hell difficulty, they can also be crafted up from Square gems.

• 2 Square gems (same type) + 100 gold + 1 tome of Jewelcrafting = 1 Flawless Square gem

To upgrade to the next level, the Perfect Square:

• 3 Flawless Square gems (same type) + 30,000 gold + 3 Tomes of Secret = 1 Perfect Square gem.

See the gems article for every gem crafting recipe and cumulative cost breakdowns.

Flawless Square Gem Stats

The stats for all types of Flawless Square Gems, as of Patch 1.0.7. (Rubies in weapons did less damage in earlier versions of the game.)

Quality	Gem	Helm	Other	Weapon
	Flawless Amethyst	+12% Life	+34 Vitality	Each Hit Adds +65 Life
	Flawless Square	+19% Increased Gold Find	+34 Precision	Critical Hit Damage Increased by 45%
	Flawless Square Ruby	Increases Bonus Experience by 19%	+34 Strength	+14 Minimum and +14 Maximum Damage
	Flawless Square Topaz	19% Better Chance of Finding Magical Items	+34 Intelligence	Melee attackers take 100 damage per hit.

A full list of gems in ascending order:

1. Chipped
2. Flawed
3. Regular
4. Flawless
5. Perfect
6. Radiant
7. Square
8. Flawless Square
9. Perfect Square
10. Radiant Square
11. Star
12. Flawless Star
13. Perfect Star
14. Radiant Star
15. Marquise Gem (Added in Patch 1.0.7.)