Tectosilicates
Amethyst
Amethyst
Balıkesir, Türkiye
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
Labradorite
Chemical Formula:
(Ca,Na)(Al,Si)4O8
Mohs Scale : 6, 6.5
Crystal System : Triclinic
Iron Stained Quartz
From Türkiye
Quartz Geode
From Türkiye
Quartz
Chemical Formula : SiO2
Mohs Scale : 7
Crystal System : Trigonal
Orthoclase & Quartz
Chemical Formula : KAlSi3O8 (potassium feldspar)
Mohs Scale : 6
Crystal System : Monoclinic
Botryoidal Purple Chalcedony
Red Quartz
From Morocco
Red colour is coused by iron oxide layer
Quartz
Agate
From Ankara, Türkiye
Agate
From Ankara, Türkiye
Quartz
Agate
From Ankara Çubuk, Türkiye
Smoky Quartz
Quartz
From Manisa, Türkiye
Quartz
Smoky Quartz
Agate
From Ankara / Çubuk
Zeolite (Heulandite)
Chemical Formula : (Ca,Na)2−3Al3(Al,Si)2Si13O36·12H2O
Mohs Scale : 3.5, 4
Crystal System : Monoclinic
Agate
From Ankara / Çubuk
Amethyst, Quartz
From Balıkesir, Türkiye
Botryoidal Chalcedony
From Manisa , Türkiye
Tiger's Eye
Chemical Formula : SiO2
Mohs Scale : 6-7
CrystalSystem:Trigonal (Microcrystalline)
Smoky Quartz
Agate
From, Ankara Türkiye
Sodalite
Chemical Formula : Na8(Al6Si6O24)Cl2
Mohs Scale : 5.5 - 6
Crystal System : Cubic
Chalcedony
Agate
From, Ankara Türkiye
Agate
From, Ankara ,Türkiye
Druzy Quartz
From Manisa, Türkiye
Botryoidal Chalcedony
From Manisa, Türkiye
Amethyst
From Balıkesir, Türkiye
Agate
From, Ankara Türkiye
Smoky Quartz
Agate
From Manisa, Türkiye
Chalcedony on calcite crystals
From Manisa, Türkiye
Quartz
From Manisa, Türkiye
Botryoidal Chalcedony
From Manisa, Türkiye
Quartz
Quartz Geode
From Manisa, Türkiye
Botryoidal Chalcedony
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
From Manisa / Türkiye
Amethyst
From Brazil.
Quartz
Quartz
From Manisa, Türkiye
Druzy quartz
Botryoidal Chalcedony
From Manisa, Türkiye
Aventurine
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
Quartz Crystals on Dolomite
Agate
From Ankara, Türkiye.
Agate
From Ankara, Turkey.
Moonstone (Hecatolite)
Chemical Formula : (Na,K)AlSi3O8
Mohs Scale : 6
Crystal System : Monoclinic
Quartz
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
From Manisa / Türkiye
Agate
From Ankara Çubuk, Turkey
Chrysoprase
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
Chalcedony Geode
Agate
From, Ankara,Türkiye
Purple Chalcedony
Chemical Formula : SiO2
Mohs Scale : 6-7
Crystal System : Trigonal
Chalcedony is a cryptocrystalline form of quartz
Quartz
From Foça, İzmir
Agate
From Ankara / Çubuk
Amazonite
Chemical Formula : KAlSi3O8
Mohs Scale : 6 - 6.5
Crystal System : Triclinic
The blue-green color of amazonite results from quantities of lead.
Jasper
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
Jasper
Aventurine
