Rubino-di-rocca=red garnet having a tinge of violet.
Ruby=red corundum.
Ruby spinel=deep-red spinel.
Ruin aragonite=brecciated Mexican onyx (aragonite).
Rutile=oxide of titanium.
S.
Sabalite=yellowish
to greenish banded phosphatic material, similar to or inclosÂing
variscite, from Utah. Sacred turquoise=pa!e-blue smithsonite.
Sagenite=transparent quartz with inclusions of hairlike or needle-like
crystals
or fibers of some other mineral, generally rutile. Samarskite=black mineral of complex composition, essentially a columbate of
yttrium,
uranium, and iron. Sandy sard=sard dotted with darker spots (quartz).
Saphir d'eau=\vater sapphire (blue cordierite). Sappar6=transparent
kyanite. Sapphire=blue corundum. The name is also applied to colorless
and colored
(except
red) corundum. Sapphire quartz=blue quartz. Sapphirine=blue chalcedony,
blue quartz ; also blue spinel; silicate of aluminum
and magnesium. Sard=chalcedony of a rich brown color, with a reddish tint; brownish-red
or
dark-brown carnelian (sardoine). Sardoine=brownish-red or dark-brown
carnelian. Sardonyx (sard-onyx) = white and brown banded chalcedony.
Satelite=serpentine cat's-eye. Satin spar=finely fibrous gypsum having
a pearly opalescence; also finely
fibrous calcite having a silky luster; also finely fibrous aragonite having
a
silky luster. Saussurite=greenisb to white or gray rock composed
chiefly of zoisite. Saxon chrysoIite=pale wine-yellow or
greenish-yellow topaz tinged with green. Saxon topaz=pale wine-yellow
topaz; also citrine (quartz). Scapolite=group of minerals composed of
silicates of aluminum, calcium, and
sodium,
with the chloride, carbonate, or sulphate radicles. Scarab=precious
stone inscribed with symbols, engraved like a beetle. Schaumburg
diamond=quartz crystal from Schaumberg, Hesse, Germany. Schiller
quartz=quartz cat's-eye. Schiller spar=bastite (enstatite). Schnecken
topaz—Saxon topaz. Schorl=bIack tourmaline.
Schorlomite=blaek
garnet containing considerable titanium. Scotch topaz=smoky quartz.
Selenite=colorles, transparent gypsum. Semicarnelian=yellow agate.
Semiopal=colorless
to strongly colored somewhat opaque, common opal. Semiturquoise=soft
pale-blue turquoise. Sepiolite=hydrous silicate of magnesium.
Serpentine=hydrous silicate of magnesium. Serpentine
cat's-eye=serpentine showing when cut a changeable luster or
opalescence without play of colors. Siam=dark-red ruby.
Sixim
ruby=dark-red ruby from Siam; also red spinel. Siberian amethyst=rich
or dark-colored amethyst. Siberian aquamarine=very light greenish-blue
beryl. Siberian chrysolite=demantoid (garnet). Siberian rtfoy=red
tourmaline.
Siberian topaz=very pale blue or bluish-white topaz. Siberite=violet-red tourmaline.
Siderite=sappharine (blue quartz). Mineralogically. a carbonate of iron. Siliceous malachite=green chrysocolla.
Silicified
wood=wood replaced by silica and small amounts of iron compounds.
Sinople=quartz having red hematite inclusions. Slave's
diamond=colorless topaz. Smaragdite=green variety of amphibole, like
actinolite; also applied to other
green stones, as the emerald, fuchsite, etc.
