GISA CERTIFIED FIERY ORANGE 3.90CT SAPPHIRE GEMSTONE WITH LOVELY ROUND CUT THERMAL HIGH - ONE OF 4 SAPPHIRES ON AUCTION THIS WEEK

THIS GEMSTONE IS A LOVELY 3.90CT (0,78G PLEASE SEE PHOTO MULTIPLY WEIGHT BY 5 TO GET CARATS) FIRE ORANGE SAPPHIRE GEMSTONE WITH A BEAUTIFUL ROUND CUT. NOTE THIS WEEK I HAVE 4 SAPPHIRES ON AUCTION. BESIDES THIS FIRY BEAUTY I HAVE A BLUE SAPPHIRE, ANOTHER ORANGE SAPPHIRE AND A MATCHED PAIR OF ORANGE EARRING GEMSTONES ALSO ON AUCTION.
 
THIS PARTICULAR STONE WAS BOUGHT ONLINE ON EBAY IN 2011 FROM A SELLER IN CHANTHABURI THAILAND. THE COUNTRY OF ORIGEN WAS INDICATED AS SONGEA TANZANIA. IT HAS A VS (EYE CLEAR) CLARITY WHICH MEANS IT IS HAS NO INCLUSIONS THAT CAN BE  SEEN WITH THE NAKED EYE WHICH IT APPEARS TO BE. IT WAS ALSO INDICATED THAT THIS SAPPHIRE HAS BEEN HEAT TREATED.
 
TESTS PERFORMED:
PASSED THE ELECTRON UV LIGHT EMISSION TEST: WEAK ORANGE RED UV REACTION.
NATURAL ORANGE SAPPHIRES: A STRONG ORANGE-RED IN THE PRESENCE OF LW. SYNTHETIC ORANGE SAPPHIRES: VERY WEAK, ORANGE TO RED IN SW.
(THE UV LIGHT HIT THE ELECTRONS. THEY JUMP AND FALL BACK. THEY RADIATE LIGHT OF A CERTAIN WAVELENGTH WHEN THEY DO WHICH IS SPECIFIC TO EACH ELEMENT IN THE MINERAL. THIS IS CALLED FLUORESCENCE. ONLY 10% OF GEMSTONES EXHIBIT A FLUORESCENCE AFFECT LIKE RUBIES, SAPPHIRE, TOPAZ, OPALS AND DIAMONDS. GLASS AND ALL NATURAL QUARTZ VARIETIES DOES NOT SHOW A UV AFFECT.)
PASSED THE THERMAL CONDUCTIVITY TEST: TESTED THE THERMAL CONDUCTIVITY WITH A MIZAR PRESTIGE SERIES 2 DIAMOND TESTER. IT MOVED UP THE LADDER FROM STANDARD LEVEL 3 TO LEVEL 6. FOR SAPPHIRES AND RUBIES A LEVEL OF 6 TO 7 IS THE NORM FOR THIS TESTER.
(WITH THIS TESTER GLASS 0,002, TANZANITE, TITANITE AND TOURMALINE MAKES NO MOVEMENT, AQUAMARINE AND EMERALD 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 OF 5. RUBIES AND SAPPHIRE 0,08 GIVES A THERMAL OF 6 TO 7.)
 
SIZE: 9.4mm x 5.9mm
 
THIS SAPPHIRE GEMSTONE HAS A SUPPLIED GISA (GEMMOLOGY INSTITUTE OF SOUTHERN AFRICA) CERTIFICATE. THIS COMPANY COULD NOT BE CONTACTED BY CONTACT DETAILS SUPPLIED ON THE BACK. THERE IS NO WEBSITE TO CHECK PAST REPORTS THAT I COULD FIND. I DO NOT KNOW IF STILL IN EXISTENCE. TO THEIR CREDIT THOUGH I HAVE SEEN CERTIFICATES BY THEM THAT I COULD INDEPENDENTLY VERIFY AS CORRECT.
 
MY PERSONAL CONCLUSION REGARDING THIS GEMSTONE:
I THINK IT IS A SYNTHETIC SAPPHIRE SINCE IT SHOWS A WEAK ORANGE RED UV FLUORESCENCE.
THE EASIEST WAY TO TELL BETWEEN A NATURAL AND LAB-CREATED SAPPHIRE IS THE FLAWLESSNESS.  OUR GEMSTONE HAS NO INCLUSIONS EYE VISIBLE. IT DOES SHOWS A VERY HIGH THERMAL CONDUCTIVITY CHARACTERISTIC OF REAL SAPPHIRE WHETHER IT BE NATURAL OR LAB CREATED.
THE COLOR AND CLARITY OF RUBIES AND SAPPHIRES IS ALSO COMMONLY ENHANCED BY HEAT TREATMENT. IT WAS STATED THAT OUR GEMSTONE WAS HEAT TREATED.
MY CONCLUSION:  IT IS PROPABLY A SYNTHETIC SAPPHIRE GEMSTONE THAT HAS BEEN HEAT TREATED AS WELL
 
DISCLAIMER: I AM NO GEMSTONE EXPERT AND NONE OF THE PRELIMERY TESTS I COULD PERFORM (SCRATCH TEST; UV TEST; THERMAL TEST) CAN CONFIRM THIS GEMSTONES NATURE AND PROPERTIES. THIS GEMSTONES BELONGED TO A FAMILY MEMBER THAT HAS PASSED AWAY. HE COLLECTED GEMSTONES DURING THE EARLY TWENTY FIRST CENTURY MANY WERE BOUGHT ON EBAY AND OTHERS BY TRAVELLING TO OTHER COUNTRIES. ADVANCED INTRUMENTS ARE NEEDED TO DISTINGUISH ONE GEMSTONE FROM ANOTHER AND TO CONFIRM IF IT IS NATURAL OR LAB MADE.
 
SAPPHIRE:
Sapphire is all the colours of the corundum mineral except red, which is the color of the ruby. CORUNDUM IS RELATIVELY COMMON IN NATURE, AND IS COMPLETELY COLOURLESS. Small amounts of metallic elements such as Cr, Fe and Ti give rise to the many colour variations in sapphire.
Corundum was the first gem mineral to be synthesized in the lab by a process known today as flame fusion and flux growth. Synthetic sapphire has been produced commercially since 1902. Since both natural and synthetic sapphires come from the same mineral corundum, lab-created gems are essentially the same as their natural counterpart, with the same visual qualities and hardness. Synthetic rubies and sapphires are presently manufactured in enormous quantities for both industrial and gem application.

PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE VARIOUS OTHER GEMSTONES ALSO ON AUCTION THIS WEEK. COPY THE URL UNDERNEATH AND PASTE INTO GOOGLE AND IT WILL TAKE YOU DIRECTLY TO ALL MY LISTINGS THIS WEEK.
https://www.bidorbuy.co.za/seller/3685641/ErnRex1545