KACHOLONG :

Synonym for cacholong 

KAHURANGI :

Variety of nephrite  translucent and of pale green colour, from  New Zealand

KALAITE :

Synonym of callaïte 

KALIFELDSPAR :

Synonym of orthose , microcline , sanidine  and adularia 

KALIGLIMMER :

German Name for muscovite  

KALKEISENGRANAT :

German Name for andradite 

KALKGRANAT :

German Name for andradite 

KALKOLIGOKLAS :

German Name for labradorite 

KALKSPATH :

German Name for calcite 

KALKTONGRANAT :

German Name for grossulaire 

KALLAINITE :

Synonym of callainite 

KALMUCK AGATE :

Synonym of cacholong 

KALMUCK OPAL :

Synonym of cacholong

KAMMKIES :

German Synonym for marcassite 

KAN C'HING JADE :

commercial Chinese Name for a pale bluish jade

KAND :

Synonym of Cand 

KANDY SPINEL :

Prohibited Appellation for a red-violet almandine garnet  of Sri Lanka

KANEELSTEIN :

German Name for a hessonite or pierre de canelle  (in French)

KAN HUANG JADE :

Chinese Name for a pale yellowish jade

KAN JADE ( Kan YU ) :

Chinese Name for a jade with the colour of cooked (boiled) chestnuts

KANN :

Synonym of Cand 

KAPNIKITE :

Synonym of rhodonite 

KARFUNKEL :

German Name for the (ancient) term carbunculus (Latin) or escarboucle  (old French)

KARLSBAD SPRING STONE :

Commercial English Name for a rubanated gypsum, white, brown , and red and used for the confection of small sculpted objects

KARNEOL :

German Name for cornelian .

KORUND :

German Name for corundum .

KARYSTIOLITE :

Synonym of chrysotile  .

KASHGAR JADE :

English Name for a nephrite mined in the neighbourhood of and of which the cutting centre is at Kashgar (Chinese Turkistan )

KATZENAUGEN :

German Name for  Cat’s eye

KAURI GUM : ( Kauri copal, or Kauri resin )

Synonym of Agathocopalite

resin from the pine tree " Dammara australis " of whitish to yellow colour, employed for imitating amber  of inferior quality

KAWAKAWA :

Variety of green nephrite ( Maori - New Zealand )

KAWK :

Synonym of fluorite.

KELVE :

Synonym of fluorite.

KERATITE :

Synonym of hornstone 

KEYSTONEITE :

Blue Chrysocolla or chalcedony  , coloured by copper silicate

KHESBET :

Ancient Egyptian name (in pharaonic times) for lapis-lazuli or a paste (or powder) having this colour

KHOROG LAPIS :

Lapis-Lazuli originating from Khorog ( Badakshan, Afghanistan)

KHOTAN JADE :

English name for nephrite mined in the neighbourhood of and of which the cutting centre is at Khotan (Sin-Kiang )

KIDNEYORE :

English Name for a variety of hematite

KIDNEY STONE :

English Prohibited Appellation for a nephrite 

KIESEL :

German synonym for a quartz 

KIESELKUPFER :

German Name for chrysocolla 

KIESELMALACHIT :

German Synonym for chrysocolla 

KIESELMANGAN :

German Synonym for Rhodonite 

KIETYOITE :

Variety of apatite 

KIKUKWASEKI :

Radial Aggregate of xenotime  and of zircon  equally known under the Name of  Chrysanthemus  Stone ( originating from the Ishikawa province Iwaki -Japan )

KILLIECRANKIE DIAMOND :

English Prohibited Appellation for a colourless topaz of Tasmania

KIMBERLITE :

Mineralogical Name for a variety of peridotite, called commonly Blue Ground, and being the mother rock of diamond

KIMPI :

Variety of jadeite  of red or brownish colour

KINDRADITE :

Erroneous orthography for Kinradite 

KING CROESUS STONE :

See Simav opal 

KINGFISHER JADE :

English name for the Chinese jade Fei-Ts’ui

KING'S CORAL :

English name for a black Coral  found in the Persian Gulf and the Great Barrier Reef in Australia

KING STONE :

English Synonym of King Topaz 

KING TOPAZ :

Prohibited Appellation for a yellow, orange or brownish corundum  ( generally also used for a padparadscha sapphire  ) ;

equally employed to designate a pale yellow citrine  ( there equally Prohibited Appellation) ;

in Ceylon : term used for designating a sapphire  of a deep yellow colour ( equally Prohibited Appellation) 

KINRADITE :

Commercial Name for a jasper containing spherules of colourless or faintly coloured quartz, from California or Oregon

Certain authors also use it to designate a orbicular jasper

KIRGHISITE :

Synonym of dioptase 

KLAPROTHINE :

Synonym of lazulite  ;

etym.: from the mineralogist Klaproth

KLAPROTHITE :

- ( of Beudant) Synonym of lazulite 

- ( of Petersen and Sanberger ) original form of Klaprotholite ( Synonym of fvittichenite )

KLASTOGELITE :

Name of a sedimentary rock cimented of opal  ( or of chalcedony  )

KLINOZOISIT :

Original Orthography of clinozoisite 

KOCHENITE :

Fossil resin resembling to amber  

etym.: of Kochenthal , Tirol

KOHLENGALMEI :

German Name for smithsonite 

KOLBINGITE :

Synonym of aenigmatite 

KOLLIN GARNET :

English Appellation for garnets (pyrope) of Kollin ( Bohemia ) See Bohemian Garnet

KONILITE :

Variety of quartz

KONGO EMERALD :

Prohibited Appellation for of la dioptase 

KOPPARGRUN :

Synonym of malachite 

KOREA JADE or KOREAN JADE :

Prohibited Appellation for a serpentine  (the bowenite variety ) ;

term equally used for designating an agalmatolite  artificially tinted

or an imitation in glass having the green colour of jade ;

May equally designate an impure variety of jade (nephrite-jade)

KOREITE :

Synonym of agalmatolite 

KORNERUPINE :

Mg₄Al₆[(O,OH)₂½BO₄½(SiO₄)₄]  

Physical and optical properties :

-          Colours : colourless, yellow, green with a very vivid lustre, olive- green, light green, brown -          Transparency : transparent
-          Lustre : vitreous
-          Hardness : 6.5
-          Density : 3.27 to 3.45
-          R.I. : 1.665(+0.017 –0.005) – 1.677(+0.022 – 0.003)
-          Birefringence : 0.012 to 0.017
-          Dispersion : 0.010 to 0.017
-          Biaxial negative
-          Trichroism : fort : green, brown pale, brown dark
-          Cleavage : prismatic perfect
-          System orthorhombic

KORNERUPITE :

Synonym of Kornerupine 

KORNITE :

Synonym of Hornstone.

KORUND :

Synonym of corundum.

KRANTZITE :

Fossil resin.

KREUZSTEIN :

German Name for chiastolite  ; equally used as a Synonym for staurotite or Croisette de Bretagne  ; this last (French) appellation is less exact

KRISOBERIL :

Original orthography for Chrysoberyl ( Source : Werner )

KRISOLITH :

German Term for Chrysolite 

KRYSOPRAS :

German Term for Chrysoprase 

KUNZITE

Synonym triphane

etym. : named after the famous American mineralogist G.F. Kunz ( discovered in 1902)

Variety of spodumene of pink, light pink, lilac pink colour

KUPFERSINTER :

German Synonym for chrysocolla

KUPFERBLAU :

(German) Variety of chrysocolla

KUPFERGRUN :

German Name for chrysocolla 

KUPFERLASUR :

German Name for azurite  (Source : Beudant )

KUPFERSMARAGD :

German Name for dioptase  ; Prohibited Appellation

KUPHOLITE :

Synonym of serpentine  

KWARC :

Synonym of quartz 

KYANITE :

Synonym : Cyanite or Dysthene.
Al₂O[SIO₄].
Silicate of aluminium.
Physical and optical properties:
- Colours : colourless, light blue with darker parts, sometimes greenish, yellow-white, yellow, brownish green
- Transparency : Transparent to translucent
- lustre : vitreous
- Hardness : 6 to 7 perpendicular to axis and 4 to 5 parallel to axis.
- S.G. : 3.65 to 3.69
- R.I. : 1.712 - 1.732 (Birefr : -0.017)
- Biaxial negative.
- System triclinic.
- Cleavage perfect and fracture planes due to polysynthetic twinning.
- Dichrosm : strong : violet blue /colourless/ dark blue.
- Fluorescence variable, but dull red under L.W.U.V.
- Spectrum of iron (2 lines in the blue) and a line in the extreme red.
Occurrences :
Product of regional metamorphism under high pressure of aluminous rocks. Often associated with garnet.
Kenya and Brazil.
Inclusions :
Inclusions due to fractures caused by polysynthetic twinning. These inclusions are present in all cut disthenes.
Confusions :
- Sapphire (S.G. : 4 ; R.I. 1.76 to 1.77).
- Sapphire synthetic (S.G. : 4 ; R.I. 1.76 to 1.77).
- Spinel blue (S.G. : 3.60 ; R.I. : 1.715 to 1.725 ; isotropic ; reddish under Chelsea filter).
- Sillimanite (S.G. : 3.5 : R.I. : 1.66 to 1.68).

KYAUK-AME or KYAUKSTONE :

Burmese Name for a black variety of jadeite ;

KYAUK-ATHA :

Burmese Name for a white and transparent  variety of jadeite;

KYAUK-ME :

Burmese Term used for designating the blackish stones of the ruby mines of Mogok

KYET TAYOE :

Burmese Name for a light green variety of a quite pale hue of jadeite-albite,

KYROSITE :

Variety of marcassite with As and Cu