Amber
—
—
—
1
0
—
Compound , Organic
Amblygonite
LiAl(PO4 )F
Amblygonite (group)
—
Open
Faceted amblygonite gem, from Ceará, Brazil. Specimen M 36903, Museums Victoria.
©
Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)
1
0
—
Mineral, Orthophosphate , Phosphate
Amblygonite (group)
LiM III (PO4 )(OH,F), M =Al,Fe
—
Tavorite , Montebrasite , Amblygonite
0
0
—
Group , Orthophosphate , Phosphate
Amesite
Mg2 Al(AlSiO5 )(OH)4 , Mg2 Al(SiAl)O5 (OH)4
Serpentine (subgroup)
—
Open
Amesite specimen from Chester, MA, USA
©
Photo by Burton Litman, via Smithsonian National Museum of Natural History
1
0
—
Mineral, Aluminosilicate , Hydroxide
Ammonium bromide
NH4 Br
—
—
2
0
—
Compound, Halide , Ammonium
Ammonium chloride
NH4 Cl
—
—
2
0
—
Compound, Halide , Ammonium
Ammonium fluoride
NH4 F
—
—
2
0
—
Compound , Halide , Ammonium
Amphibole
AX2 Z5 ((Si,Al,Ti)8 O22 )(OH,F,Cl,O)2
—
Clinoamphibole , w(OH, F, Cl)-dominant amphibole
Open
Tremolite from Mt Ibity, Antananarivo Province, Madagascar
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
1
4
EDS
Silicate , Supergroup
Analcime
NaAlSi2 O6 ·H2 O
Zeolite (group)
—
Open
Analcime on microcline, from Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
©
Photo by Modris Baum (via Wikimedia Commons), Public Domain
2
0
—
Hydrated , Mineral, Aluminosilicate
Anatase
TiO2
Titanium dioxide
—
2
0
—
Mineral, Simple oxide
Andalusite
Al2 SiO5
Andalusite (subgroup)
—
0
0
—
Mineral, Aluminosilicate
Andalusite (subgroup)
—
Al2SiO5 (group)
Yoderite , Andalusite , Kanonaite
0
0
—
Subgroup
Andersonite
Na2 Ca(UO2 )(CO3 )3 ·5-6H2 O
—
—
Open
Andersonite from Repete Mine, Blanding, San Juan County, Utah, USA
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
6
0
—
Hydrated , Uranyl , Mineral, Carbonate
Andesine
(Na,Ca)(Si,Al)4 O8
Plagioclase
—
Open
©
Photo by Dave Dyet http://www.shutterstone.com, http://www.dyet.com, Public domain
2
1
EDS
Aluminosilicate , Variety
Andradite
Ca3 FeIII 2 (SiO4 )3
Garnet
—
Open
Andradite single crystal (4.2 cm), from Sibinndi, Nioro du Sahel Circle, Kayes Region, Mali.
©
Photo by Didier Descouens (via Wikimedia Commons), CC-BY-SA 4.0
0
1
SXES
Mineral, Silicate