CATALOGUE OF GEMS AND PRECIOUS STONES. 199 



Wood stone =silicified wood. 



Wood tin=rassiterite with a concentric structure. 



World's eye=hydrophane (opal). 



X. 



Xanthite=dark yellowish-brown vesuvianite from Amity, New York. 



Y. 



Yogo sapphire=dark-blue corundrum from Yogo Gulch, Montana. 

 Yu stone = jade. 



Z. 



Zincite=zinc oxide, mostly red. 



Zircon =zirconium silicate. 



Zoisite=aluminum and calcium hydrous silicate. 



Zonite= variously colored chert or jasper, from Arizona. 



Zonochlorite=banded prehnite, similar to chlorastrolite. 



PART 2.— MINERAL NAMES. 

 A. 



Allanite. 



Amphibole=actinolite, axstone, byssolite, crocidolite, hawk's-eye, hornblende, jade, 



£ kidney stone, nephrite, New Zealand greenstone, smaragdite, smaragdus, tremolite, 

 wolf's-eye stone. 



Anatase. 



Andalusite=chiastolite, cross-stone, made, howdenite. 



Anhydrite = vulpinite . 



Ankerite=brown spar. 



Apatite =moroxite, asparagus stone. 



Apophyllite=fisheye stone, ichthyophthalmite. 



Aragonite= alabaster, California onyx, flos fern, flowers of iron, Gibraltar stone, iztac 

 chalchihuitl, Mexican onyx, mosaic agate, oriental alabaster, oriental onyx, ruin 

 aragonite, satin spar, stalactite, stalagmite, verd antique. (See also calcite.) 



Axinite. 



Azurite=blue malachite, chessy copper, chessylite. 



Azurmalachite. 



B. 



Barite. 



Benitoite. 



Beryl =aeroides, amethiste basaltine, aquamarine, aquamarine chrysolite, bixbite, 

 caesium beryl, canary beryl, chalchihuitl, chrysoberyllus, chrysolithus, david- 

 sonite, emerald, golden beryl, goshenite, heliodor, hyacinthozontes, morganite, 

 Peruvian emerald, Siberian aquamarine, smaragdite, Spanish emerald, white 

 emerald. 



Beryllonite. 



Bone turquoise =fossil turquoise, new rock, occidental turquoise, odontolite. 



Brookite=arkansite. 



C. 



Calamine=Aztec stone, chalchihuitl, hemimorphite. 



Calcite=agrite, calcomalachite, fire marble, Iceland spar, lumachelle, marble, Mexi- 

 can onyx, onyx marble, Oriental alabaster, oolite, pisolite, satin spar. 

 Cancrinite. 

 Cassiterite=toad's-eye tin, wood tin. 



