Tectosilicates
Labradorite
Chemical Formula:
(Ca,Na)(Al,Si)4O8
Mohs Scale : 6, 6.5
Crystal System : Triclinic
Amethyst
Chemical Formula : SiO2
Mohs Scale : 7
Crystal System : Trigonal
The color of amethyst has been demonstrated to result from substitution by irradiation of trivalent iron (Fe3+) for silicon in the structure.
Amethyst
Balıkesir, Turkey
Crystal Quartz
Chemical Formula : SiO2
Mohs Scale : 7
Crystal System : Trigonal
Iron Stained Quartz
From Turkey
Quartz Geode
From Turkey
Amethyst
From Balıkesir, Turkey
Quartz
Quartz
Chrysoprase
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
Agate
From Ankara / Çubuk
Agate
From Ankara / Çubuk
Botryoidal Chalcedony
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal or monoclinic
From Manisa / Turkey
Sodalite
Chemical Formula : Na8(Al6Si6O24)Cl2
Mohs Scale : 5.5 - 6
Crystal System : Cubic
Quartz
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
From Manisa / Turkey
Red Jasper
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Hexagonal
Clear/Pink/Smoky Quartz
Chemical Formula : SiO2
Mohs Scale : 7
Crystal System : Trigonal or Hexagonal
Yellow Jasper
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Hexagonal
*Jasper - Opaque chalcedony with brown, yellow, or red colours
Agate
From Ankara Çubuk, Turkey
Banded Agate
From Ankara Çubuk, Turkey
Botryoidal Chalcedony
From Manisa / Turkey
Agate
From Ankara / Çubuk
Amethyst, Quartz
From Balıkesir, Turkey
Agate
From, Ankara Turkey
Tiger's Eye
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal Sysem : Miscellaneous
An agleam variety of chalcedony with a golden brown to reddish brown colour and silky lustre
Quartz Crystals on Dolomite
Agate
From, Ankara Turkey
Amazonite
Chemical Formula : KAlSi3O8
Mohs Scale : 6 - 6.5
Crystal System : Triclinic
The blue-green color of amazonite results from quantities of lead.
Agate
From, Ankara Turkey
Agate
From, Ankara Turkey
Agate
From, Ankara Turkey
Aventurine
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Hexagonal
Aventurine - Chalcedony containing traces of hematite, goethite, or mica, producing in it a shimmering effect known aventurescence
Quartz
Purple Chalcedony
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal or monoclinic
Chalcedony is a cryptocrystalline form of silica
Yellow, Brown Agates
Chemical Formula : SiO2
Mohs Scale : 6.5 - 7
Crystal System : Trigonal ( microcrystalline)
Agate - A chalcedony variety known for its wide range of colours and banded patterns
Quartz
From Manisa, Turkey
Agate
From Manisa, Turkey
Chalcedony
From Manisa, Turkey
Quartz Geode
From Manisa, Turkey
Chalcedony Geode
Quartz
From Manisa, Turkey
Quartz
From Foça, İzmir
Zeolite (Heulandite)
Chemical Formula : (Ca,Na)2−3Al3(Al,Si)2Si13O36·12H2O
Mohs Scale : 3.5, 4
Crystal System : Monoclinic
Druzy Quartz
From Manisa, Turkey