PEAR CUT 2.40CT MODERATE BLUEISHVIOLET TANZANITE GEMSTONE PLEASE READ FULL DESCRIPTION

A LOVELY 2.40CT (0,48G PLEASE SEE PHOTOMULTIPLY BY 5 TO GET CARATS) MODERATE BLUEISH VIOLET TANZANITE GEMSTONE WITH ABEAUTIFUL PEAR CUT.
 
THE FOUR BLUE FACETED GEMSTONES THAT ARE MOST OFTEN SEEN IN COMMERCIAL JEWELRYARE IN ORDER OF HOW EXSPENSIVE THEY ARE: TOPAZ, AQUAMARINE, TANZANITE ANDSAPPHIRE. Tanzanite is one of the few trichroic gemstones known to man,meaning it has the ability to display three colours within the same gemstone.The three colours seen in a tanzanite are shades of blue, violet and red. Thetop and most sought-after colour for tanzanite is vivid royal blue.
 
THIS PARTICULAR STONE WAS BOUGHT ON EBAY IN 2011 FROM A SELLER IN CHANTHABURITHAILAND WITH THE ORIGEN OF THE STONE INDICATED AS TANZANIA. IT HAS A VVS (EYECLEAR) CLARITY WHICH MEANS IT HAS NO INCLUSIONS AS SEEN WITH THE NAKED EYEWHICH IT APPEARS TO BE. WAS ALSO SOLD AS A NATURAL AND UNHEATED GEMSTONE.
 
DISCLAIMER: I AM NO GEMSTONE EXPERT ANDTHERE ARE NO TESTS (SCRATCH TEST; UV TEST; THERMAL TEST) THAT I COULD PERFORMON TANZANITE THAT CAN CONFIRM THIS GEMSTONES NATURE AND PROPERTIES. THISGEMSTONES BELONGED TO A FAMILY MEMBER THAT HAS PASSED AWAY. HE COLLECTEDGEMSTONES DURING THE EARLY TWENTY FIRST CENTURY MANY WERE BOUGHT ON EBAY ANDOTHERS BY TRAVELLING TO OTHER COUNTRIES. ALTHOUGH TANZANITE CANNOT BESYNTHESIZED ADVANCED INSTRUMENTS ARE NEEDED TO DISTINGUISH TANZANITE OTHERGEMSTONES.
 
THE FOLLOWING UNCLEAR THERMALCONDUCTIVITY TEST I PERFORMED WOULD INDICATE THIS STONE MIGHT BE A SYNTHETICQUARTZ GEMSTONE: TESTED THE THERMAL CONDUCTIVITY WITH A MIZAR PRESTIGE SERIES 2DIAMOND TESTER. IT MOVED UP THE LADDER FROM STANDARD LEVEL 3 TO LEVEL 4.TANZANITE (ZOISITE) IS A SILICATE MINERAL WITH A THERMAL CONDUCTIVITY OF ONLY0,005 AND A LEVEL OF 3 (THE SAME AS GLASS) IS THE NORM FOR THIS TESTER.
(WITH THIS TESTER GLASS 0,002, TANZANITE0,005, TITANITE AND TOURMALINE MAKES NO MOVEMENT, AQUAMARINE 0.013 AND EMERALD0,013 LIE INBETWEEN AND CAN GIVE A LEVEL OF 3 OR 4. QUARTZ 0,026, GARNETS,SPINELS 0,028 AND KUNSITE GIVES A THERMAL OF 4, TOPAZ 0,04 GIVES A THERMAL OF5. RUBIES AND SAPPHIRE 0,08 GIVES A THERMAL OF 6 TO 7.)

SIZE: 7.5mm x 11,1mm x 5,9mm
 
TANZANITE:
Tanzanite is the blue and violet variety of the mineral zoisite, caused bysmall amounts of vanadium. It is classified as a silicate. The extraordinarygemstone was first discovered in 1967 at the foothills of Mount Kilimanjaro theonly known source in the world. All of the known deposits are confined to a fewsquare miles of land in northern Tanzania.
The mineral zoisite naturally occurs in a wide range of colors that includecolorless, gray, yellow, brown, pink, green, blue, and violet. The name"tanzanite" is used for a color variety of zoisite that ranges fromblue, through violet, to violish purple.
HEAT TREATMENT IS DONE TO ALMOST ALL OF THE TANZANITE ON THE MARKET TODAY TOIMPROVE THE COLOR. SCIENTISTS FOUND THAT HEATING COULD CONVERT SOME NATURALLYBROWN OR GREEN ZOISITE INTO BEAUTIFUL BLUE ZOISITE(TANZANITE!). WITH THEEXCEPTION OF A SMALL AMOUNT OF NATURALLY BLUE MATERIAL, HEATING IS THE SOURCEOF TANZANITE'S DESIRABLE BLUE COLOR. 
Tanzanite is one of the most sought-after gemstones of all time. According to aTanzanian geologist, the circumstances that led to its formation 585 millionyears ago were so exceptional that the likelihood of finding tanzanite anywhereelse on earth is one in a million, making it a thousand times rarer thandiamonds.
With only one known source in the world, tanzanite is predicted to be depletedwithin 10-12 years. 
 
NATURAL, SYNTHETIC OR FAKE?
There is no synthetic for tanzanite like in synthetic sapphires, ruby andemeralds. Only imitations can be a problem and they can include glass,synthetic quartz, synthetic spinel, synthetic sapphire etc.
 
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE VARIOUS OTHER GEMSTONES ALSO ONAUCTION THIS WEEK. COPY THE URL UNDERNEATH AND PASTE INTO GOOGLE AND IT WILLTAKE YOU DIRECTLY TO ALL MY LISTINGS THIS WEEK.
https://www.bidorbuy.co.za/seller/3685641/ErnRex1545