Rocos Fine Jewelry

3763 Ming Avenue Bakersfield Ca 93309 661-834-0824

Ruby

Genuine Ruby

  • AGTA:
  • RI: 1.762-1.77
  • Hardness: 9
  • Specific Gravity: 4
  • Species: Corundum
  • Optic Character: DR
  • Phenomena: Chatoyancy(Very Rare)

Quality Information

  • C2: Commericial quality; included; variation in color
  • B: Included; light pinkish red; good cut; good polish
  • A: Slightly included; medium pinkish red; good cut, good polish
  • A+: Eye clean; medium to medium dark pinkish red; good cut, good polish
  • AA: Eye clean, medium dark pinkish red; brilliance; good cut, good polish
  • AAA: Eye clean, medium dark pinkish red to red; briliance; excellent cut, good polish

Signity® Machine Cut Genuine Gemstones:

  • Bright Good Quality: Eye clean to moderately included; excellent machine cut; very good brilliance; medium dark pinkish red
  • Bright Fine Quality: Eye clean; excellent machine cut;excellent brilliance; medium dark pinkish red
  • Top Burmese Good Quality: Eye clean to moderately included; excellent machine cut; very good brilliance; dark slightly purplish red
  • Top Burmese Fine Quality: Eye clean; excellent machine cut; excellent brillance; dark slightly purplish red

Emeralds

 

Genuine Emerald

  • AGTA: 
  • Hardness: 7.5-8                                                             
  • Specific Gravity: 2.72
  • Species: Beryl
  • Optic Character: DR
  • Phenomena: Chatoyancy, Asterism (Rare)

Quality Information

  • C2: Commerical Quality; included, variation in color
  • B: Included (cloudy); light color; good cut; good polish
  • A: Slightly included; medium color; good cut; good polish
  • AA: Sightly included; medium dark color; good cut; good polish
  • AAA: Very Slightly included; medium dark to dark color; high brilliance; good cut; good polish

Tanzanite

 

 

 

 

 

It is named after the East African state of Tanzania, the only place in the world where it has been found. Africa? Does anyone think of gemstones when they hear that name? Well they should, because Africa is a continent which provides the world with a multitude of truly magnificent gemstones, like tanzanite for example. On its discovery in 1967, it was enthusiastically celebrated by the specialists as the 'gemstone of the 20th century'. They held their breath in excitement as they caught sight of the first deep-blue crystals which had been found in the Merelani Hills near Arusha in the north of Tanzania. Millions of years ago, metamorphic schists, gneisses and quartzites formed impressive, flat-topped inselbergs on a vast plain in the shadow of Kilimanjaro. The precious crystals grew in deposits on the inside of these unusual elevations. For a long, long time they were hidden from the eye of Man, until one day some passing Masai shepherds noticed some sparkling crystals lying in the sun and took them along with them.


The deep blue of the tanzanite is fantastic, and runs from ultramarine blue to light violet-blue. The most coveted colour is a blue surrounded by a delicate hint of purple, which has a particularly wonderful effect in sizes of over 10 carats. The well developed polychromaticity of the tanzanite is typical: depending on the angle from which you look at it, the stone may appear blue, purple or brownish-yellow. Having said that, most raw crystals are somewhat spoiled by a brownish-yellow component, though it can be made to disappear by the cutter if he heats the stone carefully in an oven to approximately 500°. During the procedure he must pay careful attention to the moment at which the colour turns to blue. This burning is a method of treatment which is regarded as customary in the trade, but the raw stones must be as free of inclusions as possible, since otherwise fissures may occur. In fact working with tanzanite can sometimes give even the most experienced cutter a bit of a headache, the cleavage of this gemstone being very pronounced in one direction. This exclusive gemstone is cut in every imaginable shape from the classical round shape to a number of imaginative designer cuts.

Topaz

It is a fluorine aluminium silicate and comes in yellow, yellow-brown, honey-yellow, flax, brown, green, blue, light blue, red and pink ... and sometimes it has no colour at all. The topaz.

The topaz has been known for at least 2000 years and is one of the gemstones which form the foundations of the twelve gates to the Holy City of the New Jerusalem. These so-called apocalyptic stones are intended to serve in protection against enemies and as a symbol of beauty and splendor. It cannot be proved conclusively whether the name of the topaz comes from the Sanskrit or the Greek, though the Greek name 'topazos' means 'green gemstone'. The Romans dedicated the topaz to Jupiter.

The color in which the topaz is most commonly found is yellow, and that is the color in which it occurs in one of the major German gemstone rocks, the Schneckenstein (a topaz-bearing rock said to resemble a snail) in Saxony. In the 18th century, it was mined there during a period of over 60 years. However, most of the crystals were hardly a centimeter in diameter. You had to go to Siberia or Brazil to find crystals as large as your fist. Having said that, anyone who is interested can convince himself of the beauty of cut specimens in the topaz set in Dresden's Grünes Gewölbe (Green Vault). The enormous and magnificent topaz from the Portuguese crown, the Braganza, was for a long time thought to be a diamond. It weighs 1680 ct..

 In mysticism, the topaz is attributed with a cooling, styptic and appetizing effect. It is said to dispel sadness, anger and nocturnal fears, to warn its wearer of poisons and protect him or her from sudden death. It is reputed to make men handsome and intelligent and sterile women fertile and happy. However, it is probably better not to rely too much on its magical powers, since it was also claimed that you could immerse your hand in boiling water after a topaz had been thrown into it and retract it again unharmed! It is the stone of the month November.

In the Empire style, the topaz was still widespread, but then the more reasonably priced citrine took over from it and even usurped its name - gold topaz. Since then, the topaz has been a rather exotic figure in the jewelery trade, and has been given the additional predicate 'pure' to make it clear that the topaz, not the quartz topaz, is meant. And it is still waiting for its well deserved comeback to this day.

Saphires

Genuine Sapphire Blue

  • AGTA: 
  • RI: 1.762-1.77
  • Hardness: 9
  • Specific Gravity: 4
  •                                                                                   
  • Species: Corundum
  • Optic Character: DR
  • Phenomena: Asterism, color change, chatoyancy(Very Rare),

Quality Information

  • C2: Commercial quality; included; variation in color
  • A: Slightly included; medium to dark navy; brilliance; good cut, good polish; little or no color zoning
  • A+: Very slightly included; medium navy; brilliant, good cut, good polish; little or no color zoning
  • AA: Eye clean; medium navy to royal blue; birlliance, good cut, good polish
  • AAA: Eye clean; medium navy to royal blue; brilliance; excellent cut and polish

Signity® Machine Cut Genuine Gemstones:

  • Bright Blue Good Quality: Eye clean to slightly included; excellent machine cut; very good brilliance; royal blue, no color zoning
  • Bright Blue Fine Quality: Eye clean; excellent machine cut; very good brilliance; medium navy blue, no color zoning
  • Classic Blue Good Quality: Eye clean to slightly included; excellent machine cut; very good brilliance; royal blue, no color zoning
  • Classic Blue Fine Quality: Eye clean; excellent machine cut; very good brilliance; royal blue, no color zoning
  • Top Blue Good Quality: Eye clean to slightly included; excellent machine cut; very good brilliance;

          Top Blue Fine Quality: Eye clean; excellent machine cut; very good brilliance