MASSIVE 37CT SYNTHETIC BLUE QUARTZ GEMSTONE WITH BEAUTIFUL CUSHION CUT IN FLAWLESS CONDITION

A MASSIVE 37CT (7.4G PLEASE SEE PHOTO MULTIPLY WEIGHT WITH 5 TO GET CARATS) BLUE SYNTHETIC QUARTZ GEMSTONE WITH CUSHION CUT. THIS GEMSTONE IS IN FLAWLESS CONDITION WITH NO SCRATCHES VISIBLE. ITS A BEAUTIFUL GEMSTONE YOU CAN TAKE MY WORD FOR IT.
 
THIS PARTICULAR STONE WAS BOUGHT ONLINE IN 2011 FROM AN EBAY SELLER IN CHANTHABURI THAILAND WITH THE ORIGEN OF THE STONE INDICATED AS BRAZIL. 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 QUARTZ GEMSTONE. MY THERMAL CONDUCTIVITY TEST PUT IT HOWEVER ALSO POSSIBLY IN THE TOPAZ GEMSTONE RANGE.
 
TEST PERFORMED:
TESTED THE THERMAL CONDUCTIVITY WITH A MIZAR PRESTIGE SERIES 2 DIAMOND TESTER. IT MOVED UP THE LADDER FROM STANDARD LEVEL 3 TO LEVEL 4 AND TO LEVEL 5. FOR QUARTZ A LEVEL OF 4 IS THE NORM FOR THIS TESTER. 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: 19mm SQUARISH x 12mm
 
MY PERSONAL CONCLUSION REGARDING THIS GEMSTONE:
COMMON TOPAZ IN ITS NATURAL STATE IS COLORLESS. TOPAZ IS OFTEN TREATED WITH HEAT OR RADIATION TO MAKE IT A DEEP BLUE COLOUR. NATURAL TOPAZ IS ALSO 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.
BLUE QUARTZ IS NOT SEEN IN A NATURAL STATE. SIBERIAN BLUE QUARTZ IS IN FACT DUMOTIERITE MINERAL INCLUSIONS IN QUARTZ. GIVEN THE LOW PRICE FOR NATURAL QUARTZ VARIETIES, IT MAY COME AS A SURPRISE THAT THERE IS A LARGE INDUSTRY PRODUCING SYNTHETIC QUARTZ USING A METHOD KNOWN AS HYDROTHERMAL TRANSPORT AND RECRYSTALLIZATION. A LARGE INDUSTRY HAS DEVELOPED TO CREATE SYNTHETIC QUARTZ. SMALL FRAGMENTS OF QUARTZ THAT ACT AS A SOURCE MATERIAL ARE PLACED ON THE BOTTOM OF A CONTAINER AND ACTS AS NUMEROUS SMALL SEED CRYSTALS OF QUARTZ. THIS METHOD WAS DESIGNED TO PRODUCE COLORLESS QUARTZ FOR INDUSTRIAL APPLICATIONS. BUT IT IS ALSO POSSIBLE TO GROW SYNTHETIC QUARTZ IN COLORS NOT FOUND IN NATURE, INCLUDING BLUE QUARTZ AND OTHER UNUSUAL MULTICOLORED COMBINATIONS.
SYNTHETIC QUARTZ IS REAL QUARTZ COMPOSED OF CRYSTALS OF SILICON DIOXIDE JUST LIKE NATURAL QUARTZ, BUT IS MOSTLY FREE OF INCLUSIONS AND MAKE FOR BEAUTIFUL FLAWLESS GEMSTONES.
MY CONCLUSION:  IT IS PROPABLY A SYNTHETIC BLUE QUARTZ GEMSTONE
 
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 TESTS - ADVANCED INTRUMENTS ARE NEEDED TO DISTINGUISH ONE GEMSTONE FROM ANOTHER AND TO CONFIRM IF IT IS NATURAL OR LAB MADE.
 
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE VARIOUS OTHER ORIGINAL 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