Here is the list of the gems we can get from the merchants:
Shabby shards can be purchased at merchants in the cities and combined into higher forms at the Jewelscraftsman nearby. All shabby shards are 530 each from merchant.
Garnet: adds physical attack to your weapons and physical def to your armor
Sapphire: adds magic attack to your weapons and magic def to armor
Amber: adds accuracy to your weapons and evasion to your armor
Turqoise: adds mana to your equipment
Citrine: adds hp to your equipment
Alabaster: adds metal attack to your weapons and metal resist to armor
Aquamarine: adds wood attack to weapon and wood resist to armor
Ruby: adds fire attack to weapon and fire resist to armor
Amethyst: adds water attack to weapon and water resist to armor
Topaz: adds earth attack to your weapon and earth resist to armor
Alabaster, Aquamarine, Ruby, Amethyst, and Topaz shards are used for your Crazy Stone daily quests that you can complete once a day when you get to lvl 30.
(Levels 30-60) Hou Jenhsi (530, 641) Archosaur, West
From level 30-40 (2,650 gold)
1 Shabby Alabaster Shard
1 Shabby Aquamarine Shard
1 Shabby Ruby Shard
1 Shabby Ametheyst Shard
1 Shabby Topaz Shard
From level 41-60 (7,950 gold)
1 Blemished Alabaster Shard
1 Blemished Aquamarine Shard
1 Blemished Ruby Shard
1 Blemished Ametheyst Shard
1 Blemished Topaz Shard
(Levels 61-90) Tu Jo (533, 642) Archosaur, West
From level 61-80 (23, 850 gold)
1 Common Alabaster Shard
1 Common Aquamarine Shard
1 Common Ruby Shard
1 Common Ametheyst Shard
1 Common Topaz Shard
From level 81-100 (71,550 gold)
1 Average Alabaster Shard
1 Average Aquamarine Shard
1 Average Ruby Shard
1 Average Ametheyst Shard
1 Average Topaz Shard
(Levels 91+) Tu Heng (533, 645) Archosaur, West
After turning in your shards to the required npc (changes each lvl) you have to wait 10 in-game min before you can collect your reward from the CS npcs. The exp and spirit depends on your current lvl.