Fundamental Minerals

Sialic Minerals

• Feldspars
Feldspars minerals
Alkali Feldspars
Plagioclase

• Feldspathoids
Feldspathoids
Cancrinite
Haüyne
Leucite
Nepheline
Sodalite

• Quartz

Femic Minerals

• Amphiboles
• Biotite
• Sagenitic biotite
• Kaersutite
• Olivine
• Pyroxenes
Structure/classification
Clinopyroxene

• Spodumene

Accessory Minerals

• Apatite
• Chromite
• Ilmenite
• Magnetite
• Zircon

Rare Accessory

• Allanite
• Andalusite
• Astrophyllite
• Beryl
• Calcite
• Cancrinite
• Catapleiite
• Cordierite
• Diaspore
• Eudialyte
• Fluorite
• Garnets
• Lazulite
• Lamprophyllite
• Lorenzenite
• Monticellite
• Muscovite
• Natrolite
• Naujakasite
• Niocalite
• Perovskite
• Polylithionite
• Rosenbuschite
• Rutile
• Scapolite
• Sørensenite
• Titanite
• Topaz
• Tourmaline
• Tugtupite
• Ussingite
• Wollastonite
• Xenotime
• Zinnwaldite

Alteration Products

• Chlorite
• Saussurite
• Sericite
• Uralite
• Wairakite

Microstructures

• Antiperthite
• Exsolution lamellae
• Graphic texture
• Granophyric texture
• Magmatic flow
• Myrmekite
• Pleochroic halo
• Poikilitic texture
• Perthite
• Pseudoleucite
• Zoning

Rocks

• Alkali feldspar granite
• Alkali feldspar syenite
• Alnö complex
Alnö complex
Alnöite
Sövite

• Anorthosite
• Brandberg granites
• Borolanite
• Carbonatites
Carbonatites
Alnö (Sweden)
Fogo (C. Verde)
Sao Vicente (C. Verde)
Oka (Canada)
Sokli (Finland)
Valentine (Canada)

• Cumberlandite
• Cumulate rocks
Cumulate
Adcumulate
Orthocumulate

• Diorite
• Dunite (Dun)
• Ekerite
• Eurite
• Finero harzburgite
• Foidolite (leucite)
• Foidolite (nepheline)
• Foidolite (haüyne)
• Foyaite
• Gabbro
• Gabbro "eufodite"
• Gabbro with augite
• Gabbronorite
• Granite
• Granophyre
• Greisen
• Hornblendite
• Hornblendite (cpx-hbl)
• Hornblende gabbro
• Hornblende gabbro (Adamello)
• Ijolite
• Ijolite (Magnet Cove)
• Ilimaussaq magmatic complex
Ilimaussaq
Black kakortokite
Red kakortokite
White kakortokite
Lujavrite
Naujakasite lujavrite
Naujaite
Tugtupite syenite

• Jacupiranga complex
Jacupiranga
Sövite

• Jacupirangite (Alnö)
• Jotunite
• Italite
• Kakortokite
• Kaxtorpite
• Kentallenite
• Lakarpite
• Larvik
Larvik complex
Ekerite
Larvikite

• Lherzolite (TL)
• Leucogranite
• Lujavrite
• Lugarite
• Luxullianite
• Melilitolite
• Melilitolite (wollastonite)
• Melteigite
• Monzonite
• Monzodiorite
• Naujaite
• Nepheline syenite
• Norra Kärr complex
Norra Kärr
Kaxtorpite
Lakarpite
Pulaskite

• Norite
• Olivine hornblendite
• Oka complex
Oka complex
Niocalite carbonatite
Monticellite carbonatite

• Olivine gabbro
• Orthopyroxenite
• Pegmatite
• Pegmatite (cancrinite)
• Pegmatite (nepheline)
• Peralkaline granite
• Peridotites
Peridotites
Dunite
Wherlite
Harzburgite
Garnet lherzolite
Spinel lherzolite

• Pyroxenite
• Pulaskite
• Quartz-gabbro
• Rhum layerded complex
• Serpentinized lherzolite
• Syenite
• Synnyrite
• Syenogranite
• Sodalite syenite
• Tonalite
• Troctolite
• Urtite

Naujakasite - Na₆Fe²⁺Al₄Si₈O₂₆

Naujakasite is a very rare mineral named after the type locality at Naujakasik (Naajakasik), Ilimaussaq complex (West Greenland). Naujakasite is a characteristic, rock-forming mineral of hyperagpaitic naujakasite Lujavrite from the Ilimaussaq complex. For half a century, the only known specimen of this naujakasite was a boulder weighing 350 gram, collected in 1897 by the Swedish mineralogist G.Flink. It constituted 75% of the boulder and was labelled "chlorite?". Many years later, the Danish mineralogist O.B. Bøggild (1930) confirmed that it was a new mineral, and named it after the locality, Naujakasik (now spelled Naajakasik), where the boulder was found. Naajakasik is located on the south coast of the Tunulliarfik fjord in the central part of the complex. Naujakasite was first found in outcrop in only in 1955. Naujakasite is now known to be of widespread occurrence in the Ilìmaussaq alkaline complex in the rock called naujakasite lujavrite. In 1998, the first discovery of the mineral outside Ilìmaussaq was made by in the Lovozero alkaline complex, Kola Peninsula, Russia.

Optical properties:
• Habit: Micaceous (Shiny rhomb-shaped flakes).
• Cleavage: Micaceous.
• Color: Colorless.
• Birefringence: From Low (Gray) to medium (yello-orange).

For more information about the Ilímaussaq magmatic complex, see page: "Ilímaussaq"

Naujakasite-rich lujavrite. Arfvedsonite (black), villiaumite (red) and naujakasite (lozenge-shaped). Image from e-rocks.

Big naujakasite (lozenge-shaped) in a naujakasite-rich lujavrite.. Image from e-rocks.

Bibliography

• Andersen, T., & Sørensen, H. (2005). Stability of naujakasite in hyperagpaitic melts, and the petrology of naujakasite lujavrite in the Ilímaussaq alkaline complex, South Greenland. Mineralogical Magazine, 69(2), 125-136.

Photo

Naujakasite crystals (I order gray) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)	Naujakasite crystals (I order gray) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)	Naujakasite crystals (I order gray) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 2x (Field of view = 7mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (I order gray) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. ZPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)
Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)	Naujakasite crystals (colorless) and arfvedsonite (green) in a Lujavrite. Ilímaussaq, Greenland. PPL image, 10x (Field of view = 2mm)
Naujakasite crystals (twinned) in a Lujavrite. Ilímaussaq, Greenland. XPL image, 10x (Field of view = 2mm)	Naujakasite crystals (twinned) in a Lujavrite. Ilímaussaq, Greenland. XPL image, 10x (Field of view = 2mm)	Naujakasite crystals (twinned) in a Lujavrite. Ilímaussaq, Greenland. XPL image, 10x (Field of view = 2mm)