Annite
KFeII 3 (AlSi3 O10 )(OH)2
Biotite
—
Open
Annite speimen from the type locality at Rockport, Essex County, Massachusetts, USA. Size: 6.8 x 5.4 x 4.6 cm
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
0
0
—
Mineral, Aluminosilicate , Hydroxide
Anorthite
CaAl2 Si2 O8
Plagioclase
—
Open
Anorthite specimen from the type locality at Somma-Vesuvius Complex, Naples Province, Campania, Italy. Size: 6.9 x 4.1 x 3.8 cm
©
2010 Rob Lavinsky, iRocks.com, CC-BY-SA-3.0
18
0
—
Mineral, Aluminosilicate
Anorthoclase
(Na,K)AlSi3 O8
Alkali feldspar
—
Open
Specimen of anorthoclase, from Mount Franklin, 9 km north of Daylesford, Victoria, Australia. Specimen M 24369.1, Museums Victoria
©
Photo by William D Birch, Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)
0
0
—
Aluminosilicate , Variety
Anthophyllite
☐Mg2 Mg5 Si8 O22 (OH)2
Anthophyllite root name group
—
Open
Anthophyllite specimen from Kopparberg, Ljusnarsberg, Västmanland, Sweden. Size: 47x43x30 mm
©
2010 Didier Descouen (via Wikimedia Commons), CC-BY-SA-3.0
4
0
—
Mineral, Hydroxide , Silicate
Anthophyllite root name group
◻{X 2 }{Z 5 }(Si8 O22 )(OH)2 , X and Z both Mg dominant
Mg-Fe-Mn amphibole
Ferro-anthophyllite , Proto-anthophyllite , Anthophyllite , Proto-ferro-anthophyllite
0
0
—
Silicate , Group , Hydroxide
Antigorite
Mg3 Si2 O5 (OH)4
Serpentine (subgroup)
—
Open
Specimen of antigorite, from Lord Brassey Mine, Heazlewood district, Tasmania, Australia. Size: 4.3 x 2.8cm.
©
Photo by John Sobolewski (JSS), via Wikimedia Commons, CC-BY-3.0
0
0
—
Mineral, Hydroxide , Silicate
Antimony
Sb
—
—
Open
Antimony specimen from the Monarch Antimony mine, Gravelotte, Murchison Range, Limpopo Province, South Africa. Size: 3.2 x 2.6 x 2.2 cm
©
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
13
2
SXES
Metal , Mineral , Element
Apatite
Ca5 (PO4 )3 (OH,F,Cl)
Apatite (group)
Fluorapatite , Hydroxylapatite , Collophane , Chlorapatite
Open
Doubly-terminated fluorapatite crystal in calcite, from Yates mine, Otter Lake, Pontiac RCM, Outaouais, Québec, Canada
©
Photo by Didier Descouens, CC-SA-4.0
174
12
CL, CL/SEM, EDS, Reflectance
Orthophosphate , Phosphate, Informal
Apatite (group)
—
—
Stronadelphite , Mimetite , Johnbaumite , Apatite , Pieczkaite , Pyromorphite , Svabite , Turneaureite , Alforsite , Hydroxylpyromorphite , Vanadinite
0
0
—
Group
Apophyllite
AB 4 [Si8 O22 ]X ·8H2 O, A =K,Na,NH4 ,Cs, B =Ca,Sr, X =F,OH
—
Fluorapophyllite-(K) , Fluorapophyllite-(NH4) , Fluorapophyllite-(Cs) , Fluorapophyllite-(Na) , Hydroxymcglassonite-(K) , Hydroxyapophyllite-(K)
Open
©
Photo by Photolitherland (via Wikimedia Commons), CC-BY-SA-3.0
7
3
PL/Laser
Silicate , Hydrated , Group
Aquamarine
Be3 Al2 Si6 O18
Beryl
—
0
0
—
Aluminosilicate , Variety
Aragonite
CaCO3
Calcium carbonate , Aragonite (group)
—
Open
Aragonite specimen from Mine de Salgigne, Filon Coroluna, Aude, France
©
2010 Didier Descouens (via Wikimedia Commons), CC-BY-SA-3.0
17
1
PL/Laser
Mineral, Carbonate
Aragonite (group)
X CO3 , X =Ca,Pb,Sr,Ba
—
Aragonite , Strontianite , Witherite , Cerussite
0
0
—
Carbonate , Group
Arctite
Ba(Ca7 Na5 )(PO4 )4 (PO4 )2 F3
—
—
Open
White glassy granular crystals of arctite from Vuonnemiok River Valley, Kola, Russian Federation
©
Photograph by David Hospital, CC-BY-SA 3.0
8
0
—
Mineral, Orthophosphate , Phosphate
Arfvedsonite
NaNa2 (FeII 4 FeIII )Si8 O22 (OH)2
Arfvedsonite root name group
—
0
0
—
Mineral, Hydroxide , Silicate