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nigrum Limm, est crystallus durior, dia-phana, nigrescens vel nigra. Huic coloriinterdum alius, v. c. ruhini, fard* vel hya-cinthi admixtus est, Indicum nigerrimo co-lore transitivere, Plinius hist, nat. l.XXXVH,c. X. retulit. Carteroquin, ob colorem mi-nus gratmn, gemma htec non adeo commen-dabilis est In Misnia, Boliemia, Helvetia»Cypro, Syria aliisque Orientis regionibus re-prehenditur.

§. XXXIV.

Ttirmalinus (Trip, Afthm- Turmalinus .sicher), borax diaphanus, subopacus, pur-pureus, electricus Linnaei, est gemmaperdura , ex fusco fulva , subdiapha-na. Calefactus, quin & candens, vimelectricam quaqua versum exerit, variaquecorpora, v. c. cineres, Martis, Jovis, re*guli antimonii limaturas, cinnabarim, fue-eihum pulveratum &c. attrahit atque repellit*Ad chalybem scintillat, atque angulari figurapolitus vitro, adamantis instar, vestigia im-primit. In comitatu Tyrolensi, infula Cey-lon , Brasilia &c. obvius est. Se in mododicti comitatus monte, Greiner dicto, tur-malinos fuscos forma crystallina ennaedrä*supersieiebus sulcatis, invenisse, Dn. jtbiMüller fn der Ncichrichr von d«in in Tyrotenr-eckren Turmalinen, AiZien 1778- asseruit.

S L Cum