. Hornstone, Eafily frangible. Not particularly heavy. t ■■ - Geognostic Situation. It occurs in. beds; alfo in veins, accompanied with agate. Geographic Situation. It is found at the Friedlichen Vertragc at Goldberg m Saxony. Obfervations. i. It is diftinguilhed from the preceding fpecies by lightnefs of its colours, its conchoidal fracture, a Hd its inferior tranflucency and hardnefs. c. It feems to be allied to ribbon jafper. THIRD