arbor
arborescent
arch
archimedes drill
areng ,
argent ., ., .
argental ,
argentian ,
argentic ,
argentiferous
argil
Armenite , , . azurite
armlet
armour chain
art casting
articulated joint
articulating link
artificial
artificial ageing
artificial jewellery ;
asbestos
ascension of inclusion
ase depth
ash , ,
ash sump
Ashirite , . dioptase
asmanite ,
asorite ,
aspidelite ,
assay
assay balance
assayer -
assaying
assaying of minerals ,
assemble
assembly
assembly a watch
assimilation
asteria ,
asteriated ( , )
asterism , ,
astriction
astridite ,
astrophilite -
Astrumite , . tibetan quartz
asymmetrical (bangle, ring, etc) (, ..)
atmosphere
atmosphere riser
atomic fraction
attaching
attack , ,
attend
attire
attribute ,
augelite , ( )
auger ,
augite , , , () . .
augment
aureate ,
auric
aurichalcite , ( )
auriferous gravel
austempering
autofrettage
automatic , ; ~ welding
Automolite , - , . gahnospinel
automorphic
availability ,
aventurescence , , , , ,
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aventurine , , . . ; , , ;
Aventurine fieldspar , . aventurine
aventurism , ( )
awl
awry
axes of elasticity , ,
Axe-stone . nephrite
axinite , ( , , ), ,
axis ,
Azorite . zircon
Aztec agate ,