Another Massive Diamond Recovered

Sierra Leone mining company has recovered a 476 carat rough diamond in the nation’s Kono at Meya.
The 476 Carat stone ranks as the fifth largest rough ever found in Sierra Leone.
Meya holds an exclusive diamond exploration license in the Kono district.
Meya also recovered rough diamonds weighing 27.93 carats and 19.70 carats at the same time.

Read More: DCLA 

Another Massive Diamond Recovered

Sierra Leone mining company has recovered a 476 carat rough diamond in the nation’s Kono at Meya.
The 476 Carat stone ranks as the fifth largest rough ever found in Sierra Leone.
Meya holds an exclusive diamond exploration license in the Kono district.
Meya also recovered rough diamonds weighing 27.93 carats and 19.70 carats at the same time.

Read More: DCLA 

CIBJO and the IDC Agree

The World Jewellery Confederation (CIBJO) and the International Diamond Council (IDC) have decided to use the same terminology for describing diamonds, making it easier for consumers to understand grading.

CIBJO agreed to make amendments to its Diamond Book — a guide to grading standards and terminology — following requests by the IDC, an organization that works to ensure consistency in grading across the industry. The IDC’s language will now be “harmonized” with that of the Diamond Book, CIBJO said Tuesday.

“The true beneficiaries of this agreement are the diamond consumers, who will now be able to refer to a single set of rules for describing diamonds,” said CIBJO president Gaetano Cavalieri.

The two organizations finalized the agreement at the CIBJO Congress in Bangkok this week. The International Diamond Manufacturers Association (IDMA), one of the IDC’s founding bodies, has also endorsed the new Diamond Book.

IDC http://www.internationaldiamondcouncil.org

Source: diamonds.net

CIBJO and the IDC Agree

The World Jewellery Confederation (CIBJO) and the International Diamond Council (IDC) have decided to use the same terminology for describing diamonds, making it easier for consumers to understand grading.

CIBJO agreed to make amendments to its Diamond Book — a guide to grading standards and terminology — following requests by the IDC, an organization that works to ensure consistency in grading across the industry. The IDC’s language will now be “harmonized” with that of the Diamond Book, CIBJO said Tuesday.

“The true beneficiaries of this agreement are the diamond consumers, who will now be able to refer to a single set of rules for describing diamonds,” said CIBJO president Gaetano Cavalieri.

The two organizations finalized the agreement at the CIBJO Congress in Bangkok this week. The International Diamond Manufacturers Association (IDMA), one of the IDC’s founding bodies, has also endorsed the new Diamond Book.

IDC http://www.internationaldiamondcouncil.org

Source: diamonds.net

Three large diamonds Recovered at Jubilee Pipe

108.34 carat rough diamond

82.82-carat rough diamond

     

163.11 carat rough diamond

Alrosa the Russian miner and top diamond producer by output, recovered three gem quality large rough diamonds.

A 82.82 carat, a 108.34 carat, and a 163.11 carat all light yellow or yellow.

All three rough diamonds were recovered at the Jubilee kimberlite pipe, one of Alrosa’s Mining units Aikhalsky in the country’s northeast.

The three diamonds will be sent to Alrosa’s for assessment in the coming days.

Source: DCLA 

Three large diamonds Recovered at Jubilee Pipe

108.34 carat rough diamond

82.82-carat rough diamond

     

163.11 carat rough diamond

Alrosa the Russian miner and top diamond producer by output, recovered three gem quality large rough diamonds.

A 82.82 carat, a 108.34 carat, and a 163.11 carat all light yellow or yellow.

All three rough diamonds were recovered at the Jubilee kimberlite pipe, one of Alrosa’s Mining units Aikhalsky in the country’s northeast.

The three diamonds will be sent to Alrosa’s for assessment in the coming days.

Source: DCLA 

Diamond fluorescence

There is common misconception that a diamond exhibiting fluorescence under ultra violet light has some kind of colour defect or transparency issue.

This NOT true at all. The naturally occurring fluorescence phenomenon is a unique completely hidden feature, which is present to some level in approximately 30% of all diamonds.

The effect is seen in Diamonds which have Carbon bonds which include boron.

Boron causes the diamond to glow when held under a powerful ultra violet light also known as blacklight.

The amount of boron in the Carbon bond making up the diamond will determine the level of fluorescence.  Fluorescence is rated by the Laboratory as Very Strong, Strong, Medium, Faint, None. This relates to the strength of the fluorescent glow under ultra violet light.

Read More: DCLA