Note note 39 — APPENDIX. No. III.
Reading edition
(39.) In a small minerological treatise of Tyfashy (خواص الاحجار ليو سف التيفاشي), I find the Hamest mentioned as a stone used in polishing sword blades, and other arms, and likewise to cut with. It is added, that this stone is principally found in the valley of Szafra, in the Hedjaz.