Diamond nke Otu Narị Afọ

De Beers Centenary Diamond bụ, na 273.85 carats (54.770 g), diamond nke atọ ukwuu emepụtara na Premier Mine .  N'ime dayamọnd agba agba, naanị Cullinan I na II buru ibu uzo diamond Centenary.  [1] A na- ụfọdụ diamond Centenary na agba dị ka ọkwa D agba site na Gemological Institute of America, nke bụ ɔkwan elu nke diamond na-mkpuchi ụcha ma na-mkpuchi n'ime na n'ụdị.  Akpọorọd ya diamond Centenary dị ka e sere ya n'ike siri ike maka emume Centennial nke De Beers Consolidated Mines na 11 Mee 1988. E-elu diamond Centenary na ụdị ikpeazụ na Mee 1991.

## Nchọpụta
Achọpụta diamond Centenary na Premier Mine na 17 Julaị 1986 site na iji usoro onyonyo X-ray ha.  Ihe siri ike mbụ bụ 599 carats (119.8 g) ma gosi ya na 11 Mee 1988 na emume Centennial nke De Beers Consolidated Mines.  Dị ka onye isi oche oge ahụ Julian Ogilvie Thompson kwuru, "Mụka agbakeela na Premier Mine diamond nke 599 carats (119.8 g) nke zuru oke na agba - n'ezie ọ bụ otu n'ime diamond ekwe elu nke a hụtụrụla.  o yẹ yẹ, a ga-akpọ ya diamond Centenary."

## Ịcha Centenary
Ịcha oke diamond dị otú ahụ bara uru ahụ nka na nnukwu ego.  Abụrụ Gabi Tolkowsky ka ọ bụrụ onye isi otu ndị na-ahụ maka ịbelata Diamond Centenary, yana Geoff Woolett, Jim Nash na Dawie du Plessis, ndị otu ndị injinia, ndị ọrụ ọkụ na ndị nche fotora iche iche na-enyere aka iji.  kwado ọrụ na Centenary Diamond.  [1] [2] Enwere ụlọ iche e mere n'okpuru ala na De Beers Diamond Research Laboratory na Johannesburg, South Africa maka mkpụrụ nke ọrụ na Centenary Diamond na-apụta pụta ike na nkwụsi ike ka muuqe igwe na-ama.  egwu na egwu egwu iji ihe egwu na-akpata.  nwere ike ibu mpụ diamond Centenary

Emere mbọ mbụ ahụ site na aka kama iji laser ma ọ bụ hụ ka ọ ghara ikpo ọkụ ma ọ bụ ịma jijiji diamond. Mgbe ebipụchara ma wepụ 50 carats (10 g) nke ihe gbawara agbawa ihe karịrị ụbọchị 154, a hapụrụ ndị otu ahụ nwere ihe dị ka akwa dị ihe dị ka 500 carats (100 g) . E gosipụtara atụmatụ iri na atọ dị iche iche na bọọdụ De Beers, na-atụ aro siri ike maka ihe ghọrọ ihe n'ikpeazụ gbanwetụrụ ime ụdị obi. A kọwara ọdịdị ahụ dị ka, "N'ụzọ dị irè, diamond Centenary dị ka ọdịdị obi, ma ọ nweghị oghere. Ihe oyiyi ndị otu ahụ bu n'uche bụ ọdịdị nke ga-achọ okpueze India Maharaja mma." 

## Ọnụọgụ
Emechara Centenary na February 1991, na-atụ 273.85 carats (54.770 g) na ihe na-atụ 39.90 × 50.50 × 24.55 mm.  Akpa ikpeazụ nwere ike 247: 164 na pavilion na okpueze, na 83 na eriri.  Ọ bụ na ọ dị ihe mgbe a tụlechara nkume ahụ n'ihu ọha maka uru, a maara na agbanyere ebe na ihe ọmụmụ US $ 100 nde n'oge LEDre ya na Mee 1991. A na-agbazinye nkume ahụ na ndị Elu nke London  , bụ ebe e pịa ya ruo ọtụtụ afọ.  Ekwenyere na De Beers enwekwaghị Centenary, mana ama onye nwe ya ugbu a.  De Beers ikwu okwu, na-ekwu maka ìhè aha ya.

## Hụkwa

* Ndepụta nke diamond

## Ntụaka

; Nkọwapụta

; Akwụkwọ akụkọ

* Bara nnukwu uru na Gemology: Akwụkwọ akụkọ nkeji iri na ise nke GIA. "Izu a na akụkọ ihe mere eme bara nnukwu uru: diamond Centenary" . eweghachiri 14 Eprel 2005.
* Ibe diamond ama ama nke Ryan Thompson. "Diamond Centenary" . eweghachiri 14 Eprel 2005.
* Ibe diamond ama ama nke Ryan Thompson. "Leta sitere na Gabi Tolkowsky, Master Diamond Cutter" . eweghachiri 14 Eprel 2005.
* Ụlọ akụkọ GIA "Gabi Tolkowsky na-agwa ụmụ akwụkwọ GIA okwu"&nbsp;( *[[Wayback Machine]]* ewepụtara 2012-03-15-15:38).
Òtù:Aha