GISA CERTIFIED BLOOD RED 4.55CT RUBY GEMSTONE - UV STRONG RED! HIGH THERMAL CONDUCTIVITY!

ONE OF MY LAST RUBIES SO YOU MIGHT WANT TO BID ON THIS ONE! A BEAUTIFUL 4,55CT (0,91G SEE PHOTO PLEASE MULTIPLY GRAM BY 5 TO GET CARATS) REAL (POSSIBLY NATURAL BUT PROPABLY SYNTHETIC OR LAB MADE) RED RUBY GEMSTONE WITH AN OVAL CUT.
 
THIS PARTICULAR STONE WAS BOUGHT IN 2011 FROM AN ONLINE SELLER. COUNTRY OF ORIGEN WAS NOT INDICATED. IT RECEIVED A GISA CERIFICATE WHICH INDICATED IT AS A NATURAL RUBY THAT WAS NOT HEAT TREATED. IT ALSO WAS INDICATED TO HAVE A SI2 CLARITY (INCLUSIONS EYE VISIBLE).
 
IT IS INDEED A REAL RUBY GEMSTONE (EVEN THOUGH IT MAY BE SYNTHETIC OR LAB GROWN) AS IT PASSED ALL THE TESTS I COULD PERFORM:
PASSED THE ELECTRON UV LIGHT EMISSION TEST: GIVES A STRONG RED FLUORESCENCE UNDER UV LIGHT. NATURAL RUBIES USUALLY SHOW WEAK RED FLUORESCENCE. A SYNTHETIC RUBY USUALLY SHOWS A STRONG RED FLUORESCENCE. OUR RUBY SHOWS A STRONG RED FLUORESCENCE (PLEASE SEE PHOTO) THAT WOULD INDICATE IT IS A SYNTHETIC RUBY!
(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, TANZANITE, TITANITE AND TOURMALINE MAKES NO MOVEMENT, AQUAMARINE AND EMERALD LIE INBETWEEN AND CAN GIVE A LEVEL OF 3 OR 4. QUARTZ , GARNETS, SPINELS AND KUNSITE GIVES A THERMAL OF 4, TOPAZ GIVES A THERMAL OF 5. RUBIES AND SAPPHIRE GIVES A THERMAL OF 6 TO 7.)
 
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:
THIS RUBYS THERMAL CONDUCTIVITY IS HIGH AND PUT IT IN THE CONUNDRUM (MINERAL OF RUBY AND SAPPHIRE) RANGE. IT HAS A STRONG UV FLUORESCENCE WHICH MOST PROPABLY INDICATES IT IS A SYNTHETIC OR LAB MADE RUBY. IT IS HOWEVER A REAL GEMSTONE AND EVEN IF SYNTHETIC IT SHARES VIRTUALLY ALL CHEMICAL, OPTICAL, AND PHYSICAL CHARACTERISTICS OF ITS NATURAL MINERAL COUNTERPART. IT HAS A SI CLARITY (INCLUSIONS EYE VISIBLE) WHICH WOULD SUGGEST IT CAN BE A NATURAL RUBY AS MOST LAB MADE RUBIES APPEARS FLAWLESS WITH NO INCLUSIONS EYE VISIBLE. MY CONCLUSION:  IT IS RUBY BUT UNCLEAR IF NATURAL HEAT TREATED OR LAB MADE.
 
SIZE: 10.4mm x 8.1mm x 6.1mm
 
DISCLAIMER: I AM NO GEMSTONE EXPERT AND COULD PERFORM ONLY A LIMITED NUMBER OF PRELIMARY TESTS (SCRATCH TEST; UV TEST; THERMAL TEST) THAT I COULD CONFIRM SOME OF 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. RUBY GEMSTONES CAN BE SYNTHESIZED AND ADVANCED INSTRUMENTS ARE NEEDED TO INDICATE IF NATURAL OR LAB MADE.
 
RUBIES: Firstly Rubies is one of the four precious gemstones amongst Saphire, Diamond and Emerald. Real rubies rank 9 on the Mohs scale of Hardness.
Ruby is a red type of the corundum mineral, along with sapphire. Sapphires have each color of the corundum, except red, which is the color of the ruby. Corundum is relatively common in nature, and is completely colourless. Chromium causes the red colour in rubies.
Corundum once found wide application as an industrial abrasive like sandpaper. Gem corundum is mined almost exclusively from gem gravel deposits. Historically, production has been from Myanmar (Burma), Thailand, India and Sri Lanka (Ceylon). Rubies are known as the King of Gemstones and Myanmar and Thailand honor the corundum ruby as their national stone. More recent important sources include East African countries of Madagascar, Tanzania and Mozambique.
The color and clarity of rubies and sapphires is commonly enhanced by heat treatment. This is today the rule rather than the exception. 
 
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE 8 OTHER GEMSTONES ON AUCTION THIS WEEK. SOME BEAUTIFUL SAPPHIRES AND THE BEST TANZANITE GEMSTONE YOU WILL SEE. YOU CAN SIMPLY CLICK ON MY NAME OR CLICK ON THE LINK BELOW. OR COPY THE URL UNDERNEATH AND PASTE INTO GOOGLE AND IT WILL TAKE YOU DIRECTLY TO ALL MY LISTINGS THIS WEEK. NOTE ALL MY AUCTIONS END AT 22H30 SO IT IS ADVISABLE TO PUT IN AN AUTOMATIC BID (HIGHEST PRICE YOU ARE WILLING TO PAY) EARLY.
https://www.bidorbuy.co.za/seller/3685641/ErnRex1545