Ah ok
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Gem + Scouring (in the vendor window) will reduce the level of the gem by 1. I'd just wait though, as you can just rush to do the spider killing quest (Weaver, dunno quest name) and get LMP.
BTW Split won't work on Spec Throw (noticed you mentioned it earlier about not having a gem yet), it only works on projectiles that don't pierce.
For spec throw you just want stuff like LMP/Faster Attacks/PPAD/Added Fire/Weapon Elemental (if you are using an elemental weapon, or have added fire already linked)
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I love Faster Projectiles with Spec Throw too, kills everything off screen while you kill the stuff near you, so you can just run forward and collect loot
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Don't forget to pick up a Hatred gem when you can and start leveling it, even if you can't afford the mana right away to run it it's a huge dps increase when you can
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