Cobra Jasper (aka Script Stone) Slabs Jasper is an opaque, microcrystalline form of quartz. As with any microcrystalline quartz, it is hard and takes an excellent polish with cerium or tin oxide.
Measures approximately 9/32" thick.
Ruler is in inches.
Two piece parcel measuring approximately 1/4" thick.
Three piece parcel measures approximately 3 at 7/32 to 3/16" thick.