opal nghĩa là gì

Ví dụ về opal

• 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.

• Contrarily, "opalescence" is correctly applied to the milky, turbid appearance of common or "potch" opal.

• Wealthy women wore jewels such as emeralds, aquamarine, opal, and pearls as earrings, necklaces, rings and sometimes sewn onto their shoes and clothing.

• Gems were also mined, including opal and emerald.