Reply To: Trusted Rough Sellers › Forums › Cutting Material and Identification › Trusted Rough Sellers › Reply To: Trusted Rough Sellers October 8, 2017 at 1:25 am #3546 tucsonbearParticipant @Tucsonbear After finessing the “stone holding basket”, I’m coming up with a specific gravity of 3.571. yay! it’s topaz!