The most important mineral component of lapis lazuli is lazurite(25% to 40%), a tectosilicate mineral with the formula (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)]. Most lapis lazuli also contains calcite (white), sodalite (blue), and pyrite (metallic yellow). Some samples of lapis lazuli contain augite; diopside; enstatite; mica; hauynite; hornblende, nosean, and sulfur-rich löllingite geyerite. Lapis lazuli was discovered around 6,000 years ago in the Hindu-Kush Mountains of present-day Afghanistan. Today, Afghanistan continues to be the leading producer of the lapis lazuli.

Bauxite is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium. Bauxite consists mostly of the aluminium minerals gibbsite (Al(OH)3), boehmite (Y-AlO(OH)) and diaspore (α-AlO(OH)), mixed with the two iron oxides goethite (FeO(OH)) and haematite (Fe2O3), the aluminium clay mineral kaolinite (Al2Si2O5(OH)4) and small amounts of anatase (TiO2) and ilmenite (FeTiO3 or FeO.TiO2).

• This piece is from Yatağan / Türkiye

Azurite (Cu3(CO3)2(OH)2) mineral in granite.

Silver ore from Uşak / Türkiye

•  Gold (Au), 0,66 g/t. Silver (Ag) 1.5 g/t

Anyolite is a metamorphic rock composed of intergrown green zoisite (Ca2Al3(SiO4)(Si2O7)O(OH) ), black/dark green pargasite (NaCa2(Mg4Al)(Si6Al2)O22(OH)2 ) and ruby (Al2O3:Cr).

• A pure crystal of corundum (Al2O3 ) is colorless. However, if just 1% of the Al3+ ions are replaced with Cr3+ ions, the mineral becomes deep red in color and is known as ruby. 

Unakite is a pink and green metamorphic rock composed of pink orthoclase, green epidote, and colorless to milky quartz. These colors have helped Unakite become a popular lapidary material.Unakite forms when granite is altered by hydrothermal fluids, and plagioclase in the granite is transformed into epidote. Unakite is used as a construction material, an architectural stone and a gem material.