| 单词 | opal |
| 释义 | opal (once / 3182 pages) n An opal is a gem, a semi-precious stone that comes in many shimmery, partly translucent colors. If your birthday is in October, an opal is your birthstone. An opal is a mineral made of silica, and it's found within the cracks and notches of many different kinds of rock. Most of the world's supply of opals comes from Australia. A polished opal that's been set in a ring or necklace is usually several shades or colors — most often blues and greens — with sparkles or shimmers decorating the stone. The word opal comes from the Latin opalus, and its ultimate root is probably the Sanskrit upala, "precious stone." WORD FAMILYopal: opalise, opalize, opals+/opalise: opalised/opalize: opalized USAGE EXAMPLESSeveral weeks later, however, when he got down on one knee and presented the opal engagement ring, his girlfriend presented her own ring for him. Wall Street Journal(Dec 23, 2016) Undergraduate Opal Farrell said students and faculty discussed the incident in all of her classes Wednesday. Seattle Times(Nov 03, 2016) Opal, founded in 2007, aims to engage people in environmental issues while collecting data for scientific studies. BBC(Oct 14, 2016) n a translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones Hypo|Hyper black opal a dark colored opal with internal reflections of green or red fire opal, girasolan opal with flaming orange and yellow and red colors harlequin opala reddish opal with small patches of brilliant color mineral solid homogeneous inorganic substances occurring in nature having a definite chemical composition opaque gema gemstone that is opaque |
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