CATALOGUE OF GEMS AND PRECIOUS STONES. 195 



Rock crystal=clear quartz crystal. 



Rock ruby=red garnet (pyrope). 



Rocky Mountain ruby=garnet. 



Ronianso vite= brown grossularite (garnet), aluminum and calcium silicate. 



Rosaline=thulite (pink zoisite). 



Rose quartz=massive rose-red to pink quartz. 



Rose topaz = pink topaz. 



Roselite=pink garnet. Mineralogically a calcium and cobalt hydrous arsenate. 



Royal topaz=blue topaz. 



Rubasse=quartz artificially stained red. 



Rubellite=pink and red tourmaline. 



Rubicelle= yellow or orange-red spinel. 



Rubino-di-rocca=red garnet having a tinge of violet. 



Rubolite=red opal from Texas. 



Ruby=red corundum. 



Ruby spinel = deep-red spinel. 



Ruin aragonite= breccia ted Mexican onyx. 



Rutile=titanium oxide. 



S. 



Sabalite=yellowish to greenish banded phosphatic material, similar to or inclos- 

 ing variscite, from Utah. 



Sacred turquoise =pale-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 yttrium, uranium, 

 and iron columbate. 



Sandy sard=sard dotted with darker spots (quartz). 



Saphir d'eau=water sapphire (blue cordierite). 



Sappare=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; aluminum and magnesium 

 silicate. 



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=greenish to white or gray rock composed chiefly of zoisite. 



Saxon chrysolite =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 aluminum, calcium, and sodium silicates, 

 with the chloride, carbonate, or sulphate radicles. 



Scarab = precious stone inscribed with symbols, engraved like a beetle. 



Schaumberg diamond= quartz crystal from Schaumberg, Hesse, Germany. 



Schiller quartz=quartz cat's-eye. 



Schiller spar=bastite (enstatite). 



Schnecken topaz = Saxon topaz. 



Schorl=black tourmaline. 



Schorlomite= black garnet containing considerable titanium. 



