| 单词 | plasma emerald |
| 释义 | > as lemmasplasma emerald 1. A green variety of chalcedony, valued as a semi-precious stone, and formerly used for carving into intaglios. Also more fully †plasma emerald. ΘΚΠ society > occupation and work > materials > raw material > gem or precious stone > rock crystal > [noun] > green quartz plasma1577 plasm1747 1577 J. Frampton tr. N. Monardes Three Bookes f. 19 The finest of them are like vnto Plasma of Esmeraldes [Sp. plasma de esmeraldas], which is likened to greene with a Milkishe couller. ?1733 C. Cock Catal. Signor Sterbini's Curious Coll. 3 A jasper Snuff box set in Silver... Ditto of the plasma Emerald, unset. 1761 A. Langford Catal. Coll. Antique Gems Signor de Medina. 9 A woman's head in plasma, and a Bacchante in onyx. 1770 G. von Engeström & E. M. da Costa tr. A. F. Cronstedt Ess. Syst. Mineral. 81 (note) The Plasma, or mother of the emerald of authors, is a fine pellucid true quartz, of a green or emerald colour. 1839 A. Ure Dict. Arts 208 Under it [sc. calcedony] may be grouped..chrysoprase, plasma,..and sard. 1861 C. W. King Antique Gems (1866) 14 Plasma..sometimes written Prasma..is merely Calcedony coloured green by some metallic oxide, probably copper or nickel. 1900 Brit. Mus. Ret. 64 Green plasma scaraboid, with intaglio of a warrior. 1962 C. Frondel Dana's Syst. Mineral. (ed. 7) III. 218 Plasma is virtually opaque with a conchoidal to smooth fracture. < as lemmas |
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