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LARGE 23.19CT SWISS BLUE TOPAZ GEMSTONE WITH BEAUTIFUL PEAR CUT - IRRADIATED FOR 2 YEARS!

1 was available / secondhand
R275.00 auction closed
Closed 1 Feb 23 22:31
Shipping
Standard courier shipping from R30
R30 Standard shipping using one of our trusted couriers applies to most areas in South Africa. Some areas may attract a R30 surcharge. This will be calculated at checkout if applicable.
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Free collection from Doornpoort, Pretoria
The seller allows collection for this item and will be in contact with the full collection address once the order is ready. Ready for collection by Tuesday, 11 June.
Ready to ship in
The seller has indicated that they will usually have this item ready to ship within 7 business days. Shipping time depends on your delivery address. The most accurate delivery time will be calculated at checkout, but in general, the following shipping times apply:
 
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Main centres:  1-3 business days
Regional areas: 3-4 business days
Remote areas: 3-5 business days
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Product details

Condition
Secondhand
Location
South Africa
Carats
More than 10
Cut
Pear
Clarity
VVS
Colour
Blue
Customer ratings:
Bob Shop ID
579029023

LARGE 23.19CT SWISS BLUE TOPAZ GEMSTONE WITH BEAUTIFUL PEAR CUT IRRADIATED FOR 2 YEARS!

AN BEAUTIFUL LARGE 23.19 CARAT SWISS BLUE TOPAZ GEMSTONE WITH A BEAUTIFUL PEAR CUT. COMES WITH A BEAUTIFUL PERSPEX PRESENTATION CASE AND VELVET BAG.
 
THIS PARTICULAR STONE WAS BOUGHT FROM A SELLER IN THAILAND WITH THE COUNTRY OF ORIGEN NOT SPECIFIED. 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 ALSO SOLD AS AN HEAT TREATED OR IRRADIATED TOPAZ GEMSTONE WHICH MEANS THE COLOR OF WHITE TOPAZ WAS ENHANCED BY HEAT TREATMENT.
 
IN PARTICULAR OUR STONE IS WHAT IS CALLED A SWISS BLUE TOPAZ WHICH IS THE MEDIUM BLUE INTENSITY OF TOPAZ WHERE WHITE TOPAZ HAS BEEN IRRADIATED FOR 2 YEARS TO CHANGE THE COLOR.
 

THE 3 BLUE COLORS OF TOPAZ:

SKY BLUE TOPAZ IS THE LIGHTEST COLOR OF BLUE TOPAZ WHERE WHITE TOPAZ IS IRRADIATED FOR 3 MONTHS TO CHANGE THE COLOR.
SWISS BLUE TOPAZ IS THE MEDIUM COLOR OF BLUE TOPAZ WHERE WHITE TOPAZ IS IRRADIATED FOR 2 YEARS TO CHANGE THE COLOR. IF YOU ASK ME THIS IS THE MOST BEAUTIFUL OF THE BLUE TOPAZ. ITS VALUE IS AROUND $25 PER CARAT.
LONDON BLUE TOPAZ IS THE TOP COLOR OF BLUE TOPAZ WHERE WHITE TOPAZ IS IRRADIATED FOR 4 YEARS TO CHANGE THE COLOR. IT IS A INKY GREY KIND OF BLUE
 
TESTS PERFORMED: SCRATCH TEST: IT DID SCRATCH A GLASS WINDOW PANE BUT NOT EASILY WHICH WOULD INDICATE IT IS HARDER THAN GLASS. (MOHS HARDNESS GLASS 5.5-6.5 TOPAZ 8.0)
UV LIGHT TEST: NO UV REACTION.
(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. NATURAL BLUE TOPAZ SHOULD SHOW A MODERATE YELLOW TO NO REACTION UNDER UV LIGHT. IRRADIATED TOPAZ LIKE A LONDON BLUE SHOULD ALWAYS SHOW A WEAK TO NO REACTION. (Topaz is often treated with heat or irradiation to make it a deep blue, reddish-orange, pink etc)
GEMTESTER TEST: NO GEMTESTER TEST PERFORMED. (These testers separate gemstones from one another based on their thermal conductivity or the rate at which electricity or heat transfers through the stone and are very accurate.)
CERTIFICATE: NO CERTIFICATE SUPPLIED.
 
SIZE: 24.13mm x 18.21mm x 10.70mm
 
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 THOROUGH RESEARCH AND PRELIMERARY TESTS ON EACH GEMSTONE.

 
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.
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.
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.
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.
 
PLEASE ALSO SEE MY OTHER ITEMS LISTED. I HAVE SOME OTHER GEMSTONES ALSO ON AUCTION THIS WEEK. 

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