Piece of glintstone tinged with unstable magic. Found in crystal tunnels. Break gem, using FP to produce a magic bolt. Poor quality and thereby easily broken, a sorcerer wouldn't give it a second look.

Limgrave TunnelsGrace. Dropped by Glintstone Miners. Found inside the Altus TunnelGrace. In the second cavern, head through the tunnel in the south to find a wooden balcony overlooking a pit. Drop down onto the overgrown root on the left side to reach a lower balcony below where you can find the items on a corpse. Can be purchased from Twin Maiden Husks after offering Smithing-Stone Miner's Bell Bearing (1) at the Roundtable HoldLandmark for 300 Runes. You can hold up to 10 Glinstone Scraps. You can store up to 600 Glinstone Scraps. The delayed bolts will auto-aim at the enemy you were locked on to when you used the item. If not locked on, they'll simply fly forwards. Sell Value: 100 Runes