Natural and untreated gemstones for your custom jewellery
$1,903.00– Sold Out
Rare Bi Color Tourmaline! Bright Blue Green Tourmaline. This natural bicolor gemstone of 4.71 ct is very elegant, has a perfect emerald cut and excellent clarity, its size is ideal for your personalized jewelry. Great Value.
Tourmaline and Opal are the birthstones for October. In 1952, the Jewelers of America association included the Tourmaline in the list of birthstones, becoming the second birthstone for October.
WEIGHT : 4.71 ct.
SIZE : 11.07 * 8.03 * 6.51 mm.
SHAPE : Emerald
COLOR : 18. (GB/BG) Green-Blue
TONE : 4. Medium light
SATURATION : 3. Very Slightly Brownish / Grayish
CLARITY GRADE : Eye Clean
CUT GRADE : Excellent
TREATMENT : Unheated
HARDNESS : 7 - 8
Inclusions type : Lattice defect.
We took several photos:
We take photos with daylight (no lightbox and no extra lighting at all).
And we take photos and videos on mirrors in a light box with extra lighting (this kind of photos clearly show the quality of the cut and the clarity of the gem).
Our shipping Options.
Tourmaline is the name for a group of related mineral species, with a very complex chemical composition. The name is derived of the word “tourmali”, this word in singhalese was used for colored gems, mostly zircons.
COLOR: The most important
The most expensive color varieties are Paraiba Tourmaline (vivid green and blue with copper bearing), Rubellite (vivid bright red), Indicolite (blue), Chrome Tourmaline (intense green) and Bicolor. The saturated colors have high demand, in the last years the less saturated colors (soft pink tourmalines) have become popular.
CUT & SIZES
Tourmaline is often cut into rectangular shapes because of its prismatic crystal habit, however Tourmaline's gems offer a huge variety of cuts: oval, round, emerald, pear, heart, trillion, fancy, cabochon, etc. Cat's eye tourmaline is cut into cabochon, and watermelon tourmaline is often cut into slices. Tourmaline is available in large sizes, however Paraiba tourmaline are common small sizes, as are Chrome Tourmalines or Rubellite.
CLARITY & INCLUSIONS
Paraiba, Rubellite, Watermelon, Red and Pink tourmalines will show eye-visible inclusions unlike the green and blue tourmalines which will show eye-clean inclusions.
Cat's eye tourmaline is usually translucent to opaque (the chatoyancy is because to thin needle-like inclusions).
Typical inclusions: Interconnected two-phase inclusions typical for tourmaline ("trichite"), film-like liquid inclusions, parallel oriented hollow tubes, needle-like mineral inclusions and fractures.
MdMaya Gems uses the following clarity scale when grading gemstones.
Setting aside translucent and opaque gemstones, the first classification to take into account is:
EYE CLEAN: Appears clean to the unaided eye. (Type 1, 2 and 3)
Type 1: Minute inclusions difficult to see with the unaided eye.
Type 2: Minor inclusions easy to see with the unaided eye.
Type 3: Noticeable inclusions apparent to the unaided eye.
Type 1: Minor inclusions somewhat easy to see with the unaided eye.
Type 2: Noticeable inclusions apparent to the unaided eye.
Type 3: Obvious inclusions very apparent to the unaided eye.
HEAVILY included: prominent inclusions that have a negative effect on appearance or durability.
SEVERELY INCLUDED: prominent inclusions that have a severe effect on appearance or durability or both. (Type 1, 2 and 3).
All our gemstones have been analyzed by a qualified gemologist. Each precious stone comes with a gemological certificate to guarantee its authenticity, as well as describing its unique characteristics.
Pictures in this website might not reflect the intensity and brightness of the real color of the gemstone. Additionally, the pictures might not properly represent the real size of the gem (provided in millimeters). Do not hesitate in requesting more graphic documentation of the precious stone for any clarifications. This will be provided shortly to accommodate your needs.
The photographs of the inclusions, if any, are a distinctive sign NATURAL origin.
If you are interested in obtaining more information about this gemstone, CONTACT US and we will respond as son as possible.