GLORIOUS LARGE 9.1CT BROWNISH ORANGE IMPERIAL TOPAZ GEMSTONE WITH OVAL CUT

AN AWESOME LARGE 9.1 CARAT (1.82G PLEASE SEE PHOTO MULTIPLY WEIGHT WITH 5 TO GET CARATS) BROWNISH ORANGE IMPERIAL TOPAZ GEMSTONE WITH A BEAUTIFUL OVAL CUT.
 
THIS PARTICULAR STONE WAS BOUGHT ONLINE IN 2011 FROM A SELLER IN CHANTHABURI THAILAND. THE COUNTRY OF ORIGEN WAS INDICATED AS AFRICA. IT HAS A VVS (EYE CLEAR) CLARITY WHICH MEANS IT IS FREE OF INCLUSIONS AS SEEN WITH THE NAKED EYE WHICH IT APPEARS TO BE.
IT WAS SOLD AS A NATURAL UNHEATED TOPAZ GEMSTONE.
 
Imperial with its distinct peach, pink, orange, brown or champagne hues, is  the rarest natural topaz variety. The primary source is the Ouro Preto mines of Minas Gerais, Brazil. Desposits were also found in the Urual Mountains in Russia. In fact Imperial Topaz was named in honor of the Russian monarchy who prized its luxurious golden-sherry hues.
 
TESTS PERFORMED:
PASSED SCRATCH TEST: IT DID SCRATCH A GLASS WINDOW PANE WHICH WOULD INDICATE IT IS HARDER THAN GLASS. (MOHS HARDNESS GLASS 5.5-6.5 TOPAZ 8.0)
PASSED UV LIGHT TEST: NO TO SLIGHTEST OF ORANGE ON THE CENTER UV REACTION. EXSPECTED UV REACTION IS NO TO WEAK FOR TOPAZ IN GENERAL. NATURAL SHERRY-BROWN, PINK, OR GOLDEN YELLOW TOPAZ MAY SHOW A WEAK TO STRONG ORANGE-YELLOW FLUORESCENCE.
(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 TOPAZ A LEVEL OF 5 TO 6 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 TO 6. RUBIES AND SAPPHIRE 0,08 GIVES A THERMAL OF 6 TO 7.)
 
SIZE: 11.7mm x 14,0mm x 7.4mm
 
MY PERSONAL CONCLUSION REGARDING THIS GEMSTONE:
COMMON TOPAZ IN ITS NATURAL STATE IS COLORLESS, THOUGH TRACE ELEMENT IMPURITIES CAN IN RARE INSTANCES MAKE IT PALE BLUE OR GOLDEN BROWN TO YELLOW ORANGE. TOPAZ IS OFTEN TREATED WITH HEAT OR RADIATION TO MAKE IT A DEEP BLUE, REDDISH-ORANGE, PALE GREEN, PINK, OR EVEN PURPLE. THIS GEMSTONE ALSO TESTED VERY HIGH IN THE THERMAL CONDUCTIVITY TEST. IT FALL CLEARLY IN THE TOPAZ RANGE WITH MY MIZAR TESTER.

NATURAL TOPAZ IS FOUND AS CRYSTALS THAT ARE CONSIDERABLY LARGER THAN THOSE OF MANY OTHER PRECIOUS STONES. CONSEQUENTLY, ITS PER-CARAT PRICE DOES NOT RISE MUCH AS THE SIZE OF THE GEM INCREASES AND SYNTHETIC TOPAZ IS SELDOM ENCOUNTERED. IN FACT, SYNTHETIC TOPAZ CAN BE SEEN SOLD AT A VALUE MORE THAN NATURAL TOPAZ.
MY CONCLUSION:  IT IS PROPABLY A NATURAL TOPAZ GEMSTONE THAT HAS BEEN HEAT TREATED
 
DISCLAIMER: 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. I AM NO GEMSTONE EXPERT AND COULD ONLY PERFORM SOME PRELIMINARY TETS - ADVANCED INTRUMENTS ARE NEEDED TO DISTINGUISH ONE GEMSTONE FROM ANOTHER AND TO CONFIRM IF IT IS NATURAL OR LAB MADE.
 
TOPAZ:
Topaz is a semi-precious gemstone formed from magma deposits. Chemically its made up of silicone, aluminum, and fluoride. Certain chemical impurities and differences will give it a unique color and appearance. Today, topaz deposits are found in Brazil, United States, Madagascar, Myanmar (Burma), Namibia,  Zimbabwe Mexico, Sri Lanka, Pakistan, Russia, and China.
Color is the most important factor for Topaz. Irradiated Blue topaz and colorless topaz are very affordable and widely available. Natural occurring red, pink and orange colors are rare and valuable. Blue topaz, the most common variety seen in jewelry today, has been produced in such quantities that today it is generally available for $25/ct. at retail for ring sizes. Larger sizes may be slightly more. While natural blue topazes are known, the huge production of treated blue topaz has essentially dropped the price of the natural blue down to that of the treated stone.
 
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