Strontium Titanate Rough (Fabulite) Piece:Long Edge, 19.1×12.1×8.8mm, 7.63g and it has been a

and it has been a popular gem since the first natural deposits were discovered in Russia

That's right

a wonderful mineral that is only rarely cut as gemstones

which is almost certainly what the large rod was meant for

Strontium Titanate Rough (Fabulite) Piece:Long Edge, 19.1×12.1×8.8mm, 7.63g and it has been aThese are facet rough of lab created strontium titanate, a classic labmade stone that used to be sold under several names, including "tausonite" and "fabulite". SrTiO3 has extremely high dispersion (0. 190), which is over four times that of diamond! In practical terms that means it has incredible fire it briefly was attempted as a diamond imitation, but the stones had too many rainbows and were obviously something different. It only has two downsides: