A translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones.
Roget 427:
semitransparency,
translucency,
semiopacity;
opalescence,
milkiness,
pearliness†;
gauze,
muslin;
film;
mica,
mother-of-pearl,
nacre;
mist
etc.
(cloud)
353.
[opalescent jewel]
opal.
turbidity
etc.
426.1.
... show more
Roget 440:
variegation;
colors,
dichroism,
trichroism;
iridescence,
play of colors,
polychrome,
maculation,
spottiness,
striae.
spectrum,
rainbow,
iris,
tulip,
peacock,
chameleon,
butterfly,
tortoise shell;
mackerel,
mackerel sky;
zebra,
leopard,
cheetah,
nacre,
ocelot,
ophite†,
mother-of-pearl,
opal,
marble.
check,
plaid,
tartan,
patchwork;
marquetry-,
parquetry;
mosaic,
tesserae†,
strigae†;
chessboard,
checkers,
chequers;
harlequin;
Joseph's coat;
tricolor.
... show more
Roget 847a:
jewel
[general], ,
jewelry,
jewellery†;
bijoutry†;
bijou,
bijouterie [Fr.];
trinket;
fine jewelry;
costume jewelry,
junk jewelry;
gem,
gemstone,
precious stone.
[forms of jewelry: list]
necklace,
bracelet,
anklet;
earring;
locket,
pendant,
charm bracelet;
ring,
pinky ring;
carcanet†;
chain,
chatelaine;
broach,
pin,
lapel pin,
torque.
[gemstones: list]
diamond,
brilliant,
rock [Coll.];
beryl,
emerald;
chalcedony,
agate,
heliotrope;
girasol†,
girasole†;
onyx,
plasma;
sard†,
sardonyx;
garnet,
lapis lazuli,
opal,
peridot,
tourmaline,
chrysolite;
sapphire,
ruby,
synthetic ruby;
spinel,
spinelle;
balais†;
oriental,
oriental topaz;
turquois†,
turquoise;
zircon,
cubic zirconia;
jacinth,
hyacinth,
carbuncle,
amethyst;
alexandrite†,
cat's eye,
bloodstone,
hematite,
jasper,
moonstone,
sunstone†.
[jewelry materials derived from living organisms]
pearl,
cultured pearl,
fresh-water pearl;
mother of pearl;
coral.
[person who sells jewels]
jeweler.
[person who studies gemstones]
gemologist;
minerologist.
[person who cuts gemstones]
lapidary,
lapidarian.
[study of gemstones]
gemology,
gemmology;
minerology.
... show more
Dutch: opaal
Polish: opal