In my Alinco3, I have the words 'crystal' (no quotes) and 'jewel'. That picks up every rare I've ever found, although the really rare rares aren't detected (I'll probably never see one, so I don't care about that). As far as Crag is concerned, Add 'Crystalline Shard' (click exact match, leave maximum blank), 'Aggregate Crystalline Shard' (exact match, maximum = 1), 'Large Aggregate Crystalline Shard' (exact match, maximum = 1), 'Giant Aggregate Crystalline Shard' (exact match, maximum = 1). Add 'Rare Crystalline Shard' (Exact match, maximum = 10).
This detects and picks up the shards in the proper amount, and detects the 'Crystal' that spawns the Rares. For me, anyway.
Good luck
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Arggash - level 275 Tank/3 School/Bow
ShoJimbo - retired axer Apr 2002
ViaJimbo - level 230 2H Meat Shield
Babu Bhatt - level 208 War Mage
Keith Stone - level 117 Axer