198 BULLETIN 118, UNITED STATES NATIONAL MUSEUM. 



Uralian emerald = Siberian demantoid (green garnet). 

 Utahlite= compact variscite. 

 Uvarovite=green garnet containing chromium. 



V. 



Vallum diamond =quartz crystals from the Tanjore district, Madras Presidency, 



India. 

 Variolite=dark-green orthoclase (feldspar) containing lighter-colored globular particles. 

 Variscite =green hydrous phosphate of aluminum. 

 Vegetable fossil =amber. 

 Verd an tique= variegated serpentine. 

 Verdite=green rock, composed chiefly of fuchsite (green muscovite containing 



chromium) or talc. 

 Verdolite=talcose-dolomitic breccia rock from New Jersey. 

 Vermeil le= orange-red almandite (garnet); also orange-red spinel. 

 Vermilion opal=milky opal impregnated with cinnabar. 

 Vermilite= vermilion opal. 

 Vesuvian gem=vesuvianite. 



Vesuvianite=complex silicate, chiefly of aluminum and calcium. 

 Vinegar spinel =yello wish-red spinel. 



Violane=dark violet-blue diopside (pyroxene), from Piedmont, Italy. 

 Violet stone =cordierite. 



Violite= compact purple chalcedony from San Diego County, California. 

 Volcanic chrysolite — vesuvianite. 

 Volcanic glass = obsidian. 

 Vulpinite =anhydrite . 



W. 



Wabanite=banded cream to black and gray to purple chocolate-colored slate from 



Massachusetts. 

 Wardite=aluminum hydrous phosphate. 

 Water agate=shell of chalcedony containing bubble of water. 

 Water chrysolite =moldavite. 

 Water opal = moonstone (feldspar). 



Water sapphire =true water sapphire is cordierite; also white topaz. 

 Water stone =hydrolite (opal). 



Wax agate=yellow agate, with a pronounced waxy luster. 

 Wax opal=yellow opal with a waxy luster. 

 Wernerite=scapolite. 



White carnelian= cloudy, milk-white, or very pale reddish or yellowish chalcedony. 

 White emerald = caesium beryl. 

 White jade=white nephrite; also compact white garnet; also white californite (vesu- 



vianite). 

 White sapphire = colorless corundum; also quartz. 

 White topaz =colorless topaz; also quartz. 

 Willemite=zinc silicate. 



Williamsite= variety of serpentine of a rich blackish oil-green color. 

 Wiluite=green vesuvianite; also yellowish-green to greenish- white garnet. 

 Wilsonite =purlpish-red scapolite. 

 Wolf's eye=moonstone (feldspar). 

 Wolf's eye stone =crocidolite. 

 Wollastonite=calcium silicate. 

 Wood agate =wood petrified or replaced by agate. 

 Wood opal=wood silicified by opal. 



