... used in fireglass or marble 3.10 years experience hot sell dark blue glass rocks for decoration Glass Rock.Glass Stone ... ,Amber,Ocean blue,Light grey,Light purple,Dark purple etc.Regular SizesGlass RockAvailable.Crushed Clear Glass0.1-0.3mm; 0.3 ... -4.00mm.Other size is available as per requirement. hot sell dark blue glass rocks for decoration