- agate opal
- noun
: opalized agate
Useful english dictionary. 2012.
Useful english dictionary. 2012.
Opal Creek Wilderness — IUCN Category Ib (Wilderness Area) Old growth in Opal Creek Wilderness … Wikipedia
Agate — For other uses, see Agate (disambiguation). Agate Banded agate (agate like onyx); the specimen is 2.5 cm (1 inch) wide General Category … Wikipedia
Opal — For other uses, see Opal (disambiguation). Opal An opal bracelet. The stone size is 18 by 15 mm (0.7 by 0.6 in) General Category … Wikipedia
Moss agate — pebble, 1 inch (25 mm) long. Montana mo … Wikipedia
gemstone — /jem stohn /, n. a precious or semiprecious stone that can be cut and polished for use as a gem. [bef. 1000; ME gimstone, OE gimstan. See GEM, STONE] * * * Any of various minerals prized for beauty, durability, and rarity. A few noncrystalline… … Universalium
C. V. Raman — Sir Chandrasekhara Ventata Raman, FRS Born 7 November 1888(1888 11 07) Thiruvanaikoil, Tiruchirappalli, Madras Presidency, bharath … Wikipedia
silicon — /sil i keuhn, kon /, n. Chem. a nonmetallic element, having amorphous and crystalline forms, occurring in a combined state in minerals and rocks and constituting more than one fourth of the earth s crust: used in steelmaking, alloys, etc. Symbol … Universalium
silica mineral — Any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, melanophlogite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically. * * * Introduction… … Universalium
Chert — For the Spanish municipality, see Xert. Chert Chert ( / … Wikipedia
Chalcedony — A cut and polished Chalcedony geode General Category Oxide mineral Chemical formula … Wikipedia