PINK 5,05CT SAPPHIRE WITH LOVELY OVAL CUT - ONE OF FOUR DIFFERENT COLOURED SAPPHIRES ON AUCTION THIS WEEK

THIS WEEK IS THE WEEK OF SAPPHIRES! I HAVE FOUR DIFFERENT COLOURED SAPPHIRE GEMSTONES ON AUCTION THIS WEEK: A BLUE SAPPHIRE;  A PINKSAPPHIRE; AN ORANGE SAPPHIRE AND A GREEN SAPPHIRE. PLEASE HAVE A LOOK!

THIS GEMSTONE IS A LOVELY 5,05CT (1,01G PLEASE SEE PHOTO MULTIPLY WEIGHT BY 5 TO GET CARATS) PINK SAPPHIRE GEMSTONE WITH A BEAUTIFUL OVAL CUT. COMES WITH A SMALL PERSPEX PRESENTATION CASE AND VELVET BAG.

THIS PARTICULAR STONE WAS BOUGHT IN 2011 FROM A SELLER IN CHANTHABURI THAILAND WITH THE ORIGEN OF THE STONE INDICATED AS AFRICA IT HAS A VVS1 (VERY SLIGHT INCLUSIONS) CLARITY WHICH MEANS IT IS MOSTLY FREE OF INCLUSIONS AS SEEN WITH THE NAKED EYE WHICH IT APPEARS TO BE. IT WAS ALSO SOLD AS A HEAT TREATED PINK SAPPHIRE GEMSTONE. IT WAS NOT INDICATED IF NATURAL OR LAB CREATED.

I THINK HOWEVER IT IS A SYNTHETIC SAPPHIRE SINCE IT SHOWS A STRONG RED UV FLUORESCENCE. IT SHOWS A HIGH THERMAL CONDUCTIVITY CHARACTERISTIC OF REAL SAPPHIRE WHETHER IT BE NATURAL OR LAB CREATED.

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: STRONG RED UV REACTION.

NATURAL PINK SAPPHIRES: STRONG ORANGE-RED IN LW. SYNTHETIC PINK SAPPHIRES: MODERATE TO STRONG RED OR ORANGE/RED 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.)

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. (PLEASE SEE PHOTO) 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: 9.4mm x 11,0mm x 5,8mm
 
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 ANYSTATEMENTS 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.
 
LAB-CREATED AND COLOR ENHANCED SAPPHIRES
Synthetic sapphire has been produced commercially since 1902. Since both natural and synthetic sapphires come from the same mineral corundrum, 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. This caused a resulting fall in prices for both natural and synthetic gemstones.
The color and clarity of rubies and sapphires is also commonly enhanced by heat treatment. Such processes are probably today the rule rather than the exception. 
The easiest way to tell between a natural and lab-created sapphire is the clarity. Natural sapphires have small inclusions or flaws while lab-created gems are clean and flawless.
Natural sapphires cost around $50 or more per carat. Their synthetic counterparts are only about 20% or (or $8 to $10 per carat) less exspensive.
 
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE SOME OTHER GEMSTONES ALSO ON AUCTION THIS WEEK.