Heptacut gemstone


The cutting of the colored stones is called lapidary work; the cutter is known a lapidary. Jordi Rosich and a expertise Laipdary from Barcelona developed in 2018 the Heptagonal Cut, based in the geometric figure that identifies Roosik & Co; is a faceted cut, - the faceted cut recives its character from a variety of small planes, the facets - . Its applied for transparent gems. The heptagonal cut is modern and unique cut, and the characteristics of the stone, such as depth of color and refraction has been studied to get the best reflections possible.




Topaz can be found in a variety of colours: green, yellow, red, pink, gold... and also in blue, which is undoubtedly the most popular for this gemstone. This colour is difficult to find, however, and some of the most important deposits are located in England (Cornwall), Scotland and Northern Ireland. The deep tones of blue topaz add depth to any piece of jewellery; perhaps that's why it's one of the most popular gemstones.

Color: Colorless, yellow, orange, blue, pink, violet, light green  
Moh's hardness: 8
Chemical composition: Al2 [(F,OH)2[SiO4] Fluor containing Aluminium silicate


The name probably derives from the Arabic word Faridat (Gem) but commonly used by the name Olivine because of its olive-green color. It has a vitreous and greasy luster. The deposits have been found in Australia, Burma, Zabargad, Arizona, Norway, Sri Lanka Mexico, Kenya and Tanzania.

Color: Green
Moh's hardness: 6.5-7
Chemical composition:Mg,Fe2+[SiO4] Magnesium iron silicate


The name is derived from its lemon yellow color. The coloring agentis iron. Natural citrines are rare. Most comercial citrines are heat-treated amethyst, so all Roosik & Co gemstones are NATURAL NOT TREATED, We buy the citrines from deposits of natual-colored citrines found in Spain, Brazil and the Unitated States.

Color: Light yellow to dark, gold-brown
Moh's hardness: 7
Density: 2,65
Crystal system: Hexagonal

Smoky Quartz

Named after its smoky color. The coloring is caused by a natural gamma rays. The deposits in Brazil, Madagascar, Russia, Scotland.

Color: Brown
Moh's hardness: 7
Chemical composition:SiO2 Silicon dioxide

Green amethyst

Green Amethyst or Prasiolite, is not found in nature, it is produced by heating violet amethyst from the deposit Montesuma in Minas Geriasm Brazil.

Color: green, colorless
Moh's hardness: 7
Chemical composition:SiO2 Silicon dioxide

Rose quartz

Rose qyartz is often crackled, usually a little turbid. Coloring agent is titanium and the color can fade. The deposits are in Brazil and Madagscar.

Color: pale pink, pink
Moh's hardness: 7
Chemical composition:SiO2 Silicon dioxide


The amethyst is a variety of quartz known for its characteristic violet colour which can be more or less dark. For example, Siberian grade amethysts have reddish hues and are the most highly prized variety. This gemstone was already being worked and used in jewellery in Ancient Egypt and is associated with power: it was one of the favourite gemstones of Russia's Catherine the Great and is often worn by bishops and cardinals.

Color: purple, violet
Moh's hardness: 7
Chemical composition:SiO2 Silicon dioxide

The cut


7 sides

Girddle: Mediu to thick

Polsih : Excelent.