Quartz neutralized the negative energy from the human body. 
Quartz is a hard treated mine 

Cini - Kasi : Turkish tiles have a very long history, going as far back as the 8 th century A.D. "Cini" which has an important place in traditional Turkish art, derives from middle Asia with seljuks to Anatolia.Cini became a very important part on architecture for both Anatolian seljuks and Ottoman Empire and it had classified as "KASI"  products show the beauty of the lifestyle of Palaces to mansions, from fountains to caravan series.

Beside architecture, it designed as pots and pans. The Turkish contribution, especially that of the Ottoman Empire is notable, not only to architecture, but also to all fields of Islamic art  and decoration and this kind of art named  EVAN. Like architecture, the decorative and minor arts evolved as part of the historical process. Crystal ling in to new forms and creating stylistic syntheses in line with the dominant political, social, economic and cultural trends of the time.     

Its substructure is ; six natural materials: Kaolin, sand chalk for whiteness, quartz for brightness and to clays for plasticity were mixed, milled, dampened and strained through silk to make the refined with substance (MUD) that was thrown on the wheel for hollow ware, jiggered on the wheel for plates and patted in to molds for tiles. After this phrase, it had put in to the kiln, pushily the heat rose slowly and held steady at a point approximately 1000-1100 C degree. On to these forms which fired , the painters work start. Works are painted in 2 stages. First the charcoaled design is painted over in black. This is called "tahrir" or "kontur" means the act of drawing. The next step is called `painting` The mineral colors are mixed with slip, generally containing glaze and sharing elements with the body. The pointer uses a special brush (hair from the lower mane of a female donkey). The colored workings put in to the 850 - 950 C degreed fie again after brightness with quartz, glaze and sodium carbonate. This step has risks because if th heat is too low, the glaze will not convert, the ware will shine. If the heat is too high, the colors run, smudging the design if the kiln cools to quickly, the glaze will crack.

So cinicilik is filled with difficult & risk. It must be done patiently & slowly .Its a technology so complex that it entails much loss But after all these steps a real art is being completed.

"STONE CINI" as we saw the best examples in the 15 - 16 th century is so strong than others because of its quartz and silica quantity is much more. It has a different profound, so welcome to the roses picked form the fire.