mottling lustre

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Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General … Wikipedia
obsidian — /euhb sid ee euhn/, n. a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture. [1350 1400; < L Obsidianus, printer s error for Obsianus pertaining to Obsius, the… … Universalium
Oil palm — African Oil Palm (Elaeis guineensis) Scientific classification Kingdom: Plantae … Wikipedia
picrite — /pik ruyt/, n. a granular igneous rock composed chiefly of olivine and augite, but containing small amounts of feldspar. [1805 15; < Gk pikr(ós) bitter + ITE1] * * * ▪ rock intrusive igneous rock of ultramafic (very silica poor) composition … Universalium

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