| 词汇 | opal |
| 释义 | opal noun[ C or U ] uk /ˈəʊ.pəl/ us /ˈoʊ.pəl/ a precious stone whose colour changes when the position of the person looking at it changes蛋白石，猫眼石 Luis Veiga/Photodisc/GettyImages Geology: precious & semi-precious stones amber blood diamond carbuncle carnelian conflict diamond cornelian cultured pearl garnet gem gemmy jet marcasite onyx pearl precious stone ruby semiprecious topaz turquoise unset Examples of opalopal By contrast, the accumulation of opal is strongly influenced by dissolution in the water column. The light sheet travels parallel to the cylinder axis, strikes a 3-10 cm length of the meniscus, and is reflected onto a plate of opal glass. Opal is my friend, but she really isn't my friend. Opal alerts us to another attitude. Small quantities of amethyst, peridot, and black opal are also produced. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Contrarily, "opalescence" is correctly applied to the milky, turbid appearance of common or "potch" opal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Wealthy women wore jewels such as emeralds, aquamarine, opal, and pearls as earrings, necklaces, rings and sometimes sewn onto their shoes and clothing. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Gems were also mined, including opal and emerald. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Mining is focused on non-metallic minerals with opals and kaolin the most important products. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The clock dials are set in an iron frame 23ft m in diameter, supporting 312 pieces of opal glass, rather like a stained-glass window. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The cap takes a high polish and acts as a protective layer for the opal. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Nonsense mutations that created this premature stop codon were later called "opal mutations" or "umber mutations". From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Here opal is found as a kernel in small concretions. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. The majority of silica cements are composed of quartz but can include, chert, opal, feldspars and zeolites. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Opal is another mineraloid because of its non-crystalline nature. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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