K feldspar
KAlSi3 O8
Alkali feldspar
Adularia , Microcline , Orthoclase
Open
Orthoclase specimen (27x17cm), from Minas Gerais, Southeast Region, Brazil
Photo by Didier Descouens (via Wikimedia Commons), CC-BY-SA 4.0
4
6
3
CL, EDS
Aluminosilicate , Silicate, Group , Informal
Kaliborite
KHMg2 B12 O16 (OH)10 ·4H2 O
Minerals containing OH , Minerals containing H2O
—
0
1
0
PL
Hydroxide , Mineral, Hydrated , Borate
Kaolinite
Al2 Si2 O5 (OH)4
Minerals containing OH , Kaolinite (subgroup)
—
Open
Powder white kaolinite and calcite in a blue-grey Keokuk geode, from St. Francisville, Clark Co., Missouri, USA
Photo by John Krygier (http://www.mindat.org/user-13767.html#0), Public Domain
19
17
1
Reflectance
Hydroxide , Mineral, Aluminosilicate
Kaolinite (subgroup)
Al2 Si2 O5 (OH)4
Kaolinite-Serpentine Group
Kaolinite , Dickite , Halloysite , Nacrite
0
9
0
Reflectance
Hydroxide, Aluminosilicate , Subgroup
Kapitsaite-(Y)
Ba4 Y2 Si8 B4 O28 F
Hyalotekite (group)
—
0
6
0
PL
Mineral , REE, Borosilicate
Keldyshite
Na2-x Hx ZrSi2 O7 ·n (H2 O)
Minerals containing H2O
—
0
1
0
PL/XL
Mineral, Silicate , Hydrated
Kentbrooksite
(Na,REE)15 (Ca,REE)6 Mn3 Zr3 Nb(Si25 O73 )(O,OH,H2 O)3 (F,Cl)2
Minerals containing OH , Minerals containing H2O
—
1
0
0
—
Hydroxide , Mineral, Hydrated , Silicate , Halide
Khibinskite
K2 ZrSi2 O7
—
—
0
3
0
PL
Mineral, Silicate
Kratochvílite
(C6 H4 )2 CH2
—
—
0
1
0
PL
Mineral, Organic
Kunzite
LiAlSi2 O6
Spodumene
—
Open
Kunzite specimen from the Konar Valley, Nuristan, Afghanistan. Size: 13.5x11.8cm
2009 Didier Descouens (via Wikimedia Commons), CC-BY-SA-3.0
0
3
1
CL/SEM
Silicate , Variety
Kurchatovite
CaMgB2 O5
—
—
0
3
0
PL, PL/XL
Mineral, Borate
Kyanite
Al2 SiO5
Aluminium silicate, Al2SiO5 , Al2SiO5 (group)
—
Open
Kyanite specimen from Ticino, Switzerland
Photo by Chip Clark, via Smithsonian National Museum of Natural History
4
23
5
CL, CL/SEM, EDS
Mineral, Aluminosilicate
Köttigite
Zn3 (AsO4 )2 ·8H2 O
Minerals containing AsO4 , Minerals containing H2O
—
1
0
0
—
Mineral, Arsenate , Hydrated