Preciosa

The Masters of Crystal

Materials

Cubic Zirconia

Two Squares - Zirconia
Cubic zirconia, also known as CZ, was created as a more affordable alternative to genuine diamonds. Cubic zirconia is the best synthetic stone of all diamond´s substitutes. It comes in every imaginable colour and at a fraction of the cost of other gemstones. Zirconia is an ideal raw material for the production of jewellery thanks to its hardness comming close to the hardness of ruby or sapphire, and optical properties close to those of diamond.
8.4.2008 23:56:15 | read 19296x | Táňa Jersáková | Whole article
 

Genuine Spinel

Genuine black spinel
The name may be derived from the Latin word spinella, meaning "little thorn", possibly referring to the fact that some spinel crystals are found with sharp points. Spinel is almost a secret among gem lovers. It's hardness of 8, and lack of cleavage makes for a tough and durable gemstone. It mimics corundum, and crystals are found in a wide spectrum of colors, including red, orange, yellow, dark green, blue, purple, brown and black.
8.4.2008 23:56:33 | read 13391x | Táňa Jersáková | Whole article
 

Synthetic Spinel

Blue Spinels
Synthetic spinel is produced by the Verneuil method and is most often used as an imitation of stones other than spinel, such as blue sapphire or aquamarine. It is an outstanding synthetic material characterised by great hardness, a high refraction index, sharp dispersion of light, and a wide variety of colours.
8.4.2008 23:57:10 | read 15049x | Táňa Jersáková | Whole article
 

Synthetic Corundum

Corundum
Synthetic corundum, in the form of synthetic ruby, was the first gemstone reproduced by artificial techniques. Auguste Victor Louis Verneuil invented the flame-fusion technique (now know as the Verneuil method) of melting aluminum oxide and allowing it to recrystallize in a cone-shaped boule, the colour of which can be controlled by the addition of chemical additives.
8.4.2008 23:57:30 | read 15948x | Táňa Jersáková | Whole article
 

Nanogems

Nanocrystal
Nanogems* completely imitate their gemstone counterparts in colour, brightness, hardness and density.

High thermal shock resistance makes this material ideal for use in the lost-wax casting method. It is also resistant to acids, bases and humidity and its properties will remain stable for centuries.

* Material exlusively manufactured by Formica Co.,Ltd. sole producer in the world
8.4.2008 23:58:10 | read 13681x | Táňa Jersáková | Whole article
 

Marcasite

Marcasite
Marcasite used in jewellery is actually iron pyrite, since genuine marcasite often crumbles into dust and is thus too delicate to be used in jewellery. The composition of iron sulphide and iron pyrite is the same, however they crystallize differently. Pyrite is a very common mineral. The brassy-yellow metallic colour of Pyrite has in many cases lead to people mistaking it for Gold, hence the common nickname 'Fools Gold'.
8.9.2009 15:45:27 | read 18910x | Whole article
 
8.4.2008 23:55:55 | read 18910x

News

KEVOLIE’s The Golden Era Glitters with PRECIOSA Crystal Extravagance On June 16th Kev Yiu debuted his latest collection titled The Golden ...
 
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