NATURAL ROUGH PIECE OF WHITE CORUNDUM (WHITE SAPPHIRE) 3,77G PIECE FROM AFRICA

THIS IS A NATURAL ROUGH PIECE OF COLORLESS TO PALE BLUE WHITE CORUNDRUM (WHITE SAPPHIRE) MINED IN AFRICA. IT WEIGHS 3,77G OR 18,85CT. WHITE SAPPHIRES ARE QUITE RARE AS THEY ARE COMPLETELY UNTOUCHED BY TRACE ELEMENTS.YET THE COLORFUL VARIETIES OF CORUNDRUM ARE MORE PRIZED AND SOUGHT AFTER.
 
NOTE THIS WEEK I HAVE 3 OTHER SAPPHIRES - BLUE, ORANGE AND GREEN SAPPHIRE GEMSTONES ALSO ON AUCTION. ALL MY AUCTIONS END AT 22H30 SO IT IS ADVISABLE TO PUT IN AN AUTOMATIC BID (HIGHEST PRICE YOU ARE WILLING TO PAY) EARLY.
 
THIS PARTICULAR STONE WAS BOUGHT IN 2011 FROM A SELLER IN CHANTHABURI THAILAND WITH THE ORIGEN OF THE STONE INDICATED AS AFRICA. IT WAS ALSO SOLD AS A NATURAL SAPPHIRE PIECE THAT WAS HEAT TREATED.
 
I DO NOT THINK THIS IS A REAL NATURAL WHITE SAPPHIRE AS THE THERMAL CONDUCTIVITY TEST INDICATE IT SHOWS A LOW LEVEL 4 THERMAL CONDUCTIVITY NOT CHARACTERISTIC OF SAPPHIRE BUT CHARACTERISTIC OF QUARTZ!
 
TESTS PERFORMED:
PASSED THE SCRATCH TEST: IT DID SCRATCH A GLASS WINDOW PANE WHICH WOULD INDICATE IT IS HARDER THAN GLASS. (MOHS HARDNESS GLASS 5.5-6.5 SAPPHIRE 9.0)
PASSED THE ELECTRON UV LIGHT EMISSION TEST: NO UV REACTION.
NATURAL COLORLESS (WHITE) SAPPHIRES: LIGHT RED TO ORANGE IN LW SYNTHETIC COLORLESS SAPPHIRES: INERT TO WEAK BLUEISH WHITE IN LW
(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.)
FAILED 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 4. FOR SAPPHIRES AND RUBIES A LEVEL OF 6 TO 7 IS THE NORM FOR THIS TESTER.
(WITH THIS TESTER GLASS MAKES NO MOVEMENT AND QUARTZ GOES UP TO LEVEL 4.)
 
SIZE: 16mm x 9mm x 8mm
 
DISCLAIMER: I AM NO GEMSTONE EXPERT. THESE 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 HAVE TRIED TO VERIFY AS FAR AS POSSIBLE ANY STATEMENTS OR CLAIMS BY DOING SOME RESEARCH AND PRELIMARY TESTS ON EACH GEMSTONE.
 
SAPPHIRE:
Sapphire is one of the four precious gemstones amongst Rubies, Diamond and Emerald. Sapphire rank 9 on the Mohs scale of Hardness. Only a diamond can scratch sapphire.
Sapphire is a 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 can substitute for aluminum in the structure, which gives rise to many colour variations in sapphire.
Historically production of sapphire has been from Myanmar (Burma), Thailand, India and Sri Lanka (Ceylon). More recent important sources include East African countries of Madagascar, Tanzania and Mozambique.
 
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