Armenian stone=(in part )lapis lazuli.
Arrow points=Indian arrowheads mostly made of quartz, more rarely of obÂsidian or other fine-grained rock.
Asparagus stone=pale-yellow apatite.
Asteria=asteriated sapphire; also any gem showing a six-ray star when cut cabochon.
Asteriated topaz=asteriated oriental topaz (yellow corundum).
Australian sapphire=deep inky blue sapphire (corundum).
Automolite=dark-green to nearly black zinc spinel.
Aventurine=opaque
yellow, brown, or red massive quartz containing incluÂsions of minute
scales of some other mineral, such as mica or iron oxide.
Aventurine feldspar=sunstone.
Axstone=nephrite.
Axinite=hydrous borosilieate of aluminum, calcium, iron, and manganese.
Aztec stone=chalchihuitl.
Azure quartz=blue quartz.
Azure stone=lapis lazuli.
Azulite=pale-blue smithsonite.
Azurite=blue, hydrous carbonate of copper.
Azurite malachite=azurmalaehite.
Azurmalachite=combination of the copper carbonates azurite (blue) and malachite (green) from the copper mines of Arizona.
B.
Baffa diamond=quartz crystal.
Bahias=diamonds from Bahia, Brazil.
Balas ruby=rose-red or pink spinel.
Barite=sulphate of barium.
Basanite=velvet black, flinty quartz.
Bastite=variety of bronzite.
Beckite=silicifled coral shells or fossiliferous limestone replaced by silica.
Beekite=beckite.
Bemiscite=salmon-colored feldspar from Bemis, Maine.
Benitoite=blue silicate of barium and titanium.
Beryl=silicate of aluminum and beryllium with small amounts of other
elements. Beryllonite=phosphate of beryllium and sodium. Bishop's stone=amethyst.
Bixbite=red and rose-colored beryl from Utah. Black amber=jet. Black lava glass=obsidian.
Black
opal=opal in a dark matrix; also opal with vivid colors. Blood
agate=flesh-red, pink, or salmon-colored agate from Utah. Blood
,iasper=bloodstone. Bloodstone=massive dark-green jasper (plasma) with
red or blood-colored
spots;
also hematite (German usage). Blue ehrysoprase=chalcedony stained blue
with ehrysocolla. Blue iohn=dark-blue fluorite, tinged with violet.
Blue malachite=azurite.
Blue
moonstone=blue chalcedony from the Death Valley region, Cal. Blue
rock=lapis lazuli from California. Blue white=diamond of highest grade.
Bobrowska garnet=grossularite (garnet). Bohemian diamond=rock crystal
(quartz). Bohemian garnet=dark blood-red pyrope (garnet). Bohemian
topaz==yellow quartz. Bohemian ruby=red or rose quartz.
Bnnamite=transluoent
apple-green smithsonite from New Mexico. Bone turquoise=teeth of fossil
animals (mammoths, mastodons, etc.) stained
blue by phosphate of iron. Bottle stone=moldavite.
Bo\venite=unusually translucent serpentine of a cream color. Brazilian aquamarine=greenish topaz.
Brazilian
diamond=diamond from Brazil; also clear quartz from Brazil. Brazilian
emerald=green tourmaline. Brazilian pehble=rock crystal (quartz).
