July 01, 2016, 07:26:34 AM
collapse

Author Topic: Diamond facts  (Read 442 times)

Offline ɯɐɹʞıʌ

  • Naujawan
  • **
  • Like
  • -Given: 51
  • -Receive: 21
  • Posts: 428
  • Tohar: 0
  • Gender: Male
    • View Profile
Diamond facts
« on: October 10, 2011, 09:12:58 PM »
A diamond is the hardest natural substance on earth, but if it is placed in an oven and the temperature is raised to about 763 degrees Celsius (1405 degrees Fahrenheit), it will simply vanish, without even ash remaining. Only a little carbon dioxide will have been released.

Diamonds are formed over a period of a billion or more years deep within earth’s crust – about 150km (90 miles) deep – and is pushed to the surface by volcanoes. Most diamonds are found in volcanic rock, called Kimberlite, or in the sea after having been carried away by rivers when they were pushed to the surface.

A diamond is 58 times harder than the next hardest mineral on earth, corundum, from which rubies and sapphires are formed. It was only during the 15th century that it was discovered that the only way to cut diamonds was with other diamonds. Yet, diamonds are brittle. If hit hard with a hammer, a diamond will shatter or splinter.

The largest diamond

The world’s largest diamond was the Cullinan, found in South Africa in 1905. It weighed 3,106.75 carats uncut. It was cut into the Great Star of Africa, weighing 530.2 carats, the Lesser Star of Africa, which weighs 317.40 carats, and 104 other diamonds of nearly flawless color and clarity. They now form part of the British crown jewels.

The Cullinan was three times the size of the next largest diamond, the Excelsior, which was also found in South Africa. The world’s largest documented polished diamond – unearthed in 1986, also in South Africa – is called Unnamed Brown. It weighs 545 carats and was cut down from a 700 carat rough diamond. It took an international team of expert cutters 3 years to complete the masterpiece. Another impressive diamond that also took 3 years to cut, and also is part of the British crown jewels, is the Centenary Diamond. It weighs 273.85 carats and is the world’s largest flawless diamond.

The biggest diamond in the entire universe is thought to be Lucy, a crystallized white dwarf star, a star consisting of diamonds. It’s weight is 10 billion trillion trillion carat. Named after the Beatles song, Lucy in the Sky with Diamonds, it is technically known as BPM 37093.

Diamond colors

Not all diamonds are white. Impurities lend diamonds a shade of blue, red, orange, yellow, green and even black. Vivid blue, green and pink mined diamonds are the rarest. They are not the rarest gemstones, however. That title goes to a pure red ruby. Diamonds actually are found in abundance; thousands are mined every year. 80% of them are not suitable for jewelery – they are used in industry or in cheap rings.

Synthetic diamonds

Late in the 19th century, Scottish scientist James Ballantyne Hannay mixed lithium with bone oil and paraffin, sealed it in iron tubes and heated it to red hot. He claimed, in 1879, the resultant stones were diamonds. They were stored away and only many years later they were found to be diamonds, albeit synthetic. In 1892, Henri Moissan theorized that diamonds could be synthesized by crystallizing carbon under pressure. Today, synthetic diamonds is big business, outselling mined diamonds by far. Sometimes called cubic zirconia and synthetic moissanite, they are categorized and evaluated with the same grading scale process as mined diamonds but sell for much less. Synthetic moissanite is a diamond simulant with similar thermal characteristics to mined diamonds and most people, even so-called experts, can’t tell them apart.

Weighing diamonds

A diamond carat differs from a gold carat. The gold carat indicates purity – pure gold being 24 carats. One diamond carat, for mined or synthetics diamonds, is 200 milligrams (0.007055 oz). The word carat derives from the carob bean. Gem dealers used to balance their scales with carob beans because these beans all have same weight



Punjabi Janta Forums - Janta Di Pasand

Diamond facts
« on: October 10, 2011, 09:12:58 PM »

 

Related Topics

  Subject / Started by Replies Last post
13 Replies
9583 Views
Last post October 21, 2009, 05:11:08 PM
by powerlifter
8 Replies
801 Views
Last post November 11, 2009, 10:19:28 PM
by SonnenKinder
25 Replies
2180 Views
Last post January 28, 2010, 06:31:22 PM
by >>Pure_Poison<<
7 Replies
1791 Views
Last post September 06, 2014, 04:11:41 PM
by MyselF GhainT
2 Replies
363 Views
Last post July 30, 2010, 02:15:30 AM
by EvIL_DhoCThoR
1 Replies
527 Views
Last post September 28, 2010, 05:54:53 PM
by ♥ Lilly ♥
11 Replies
946 Views
Last post October 22, 2011, 09:08:18 PM
by ਦਿਲਰਾਜ -ਕੌਰ
11 Replies
1367 Views
Last post December 17, 2011, 08:51:04 AM
by ÐèṤἷḷ¡
0 Replies
256 Views
Last post May 08, 2012, 07:25:57 PM
by σн мαん gαω∂ Jค┼┼ ƒєя αgєуα
0 Replies
245 Views
Last post May 11, 2012, 06:31:02 AM
by RA JA (B@TTH)

* Who's Online

  • Dot Guests: 103
  • Dot Hidden: 0
  • Dot Users: 1
  • Dot Users Online:

* Recent Posts

Best DP of the Week by αмαи кαυя👑
[Today at 04:06:11 AM]


Picture of Day by ਕਰਮਵੀਰ ਸਿੰਘ
[Today at 03:47:59 AM]


Hitler funny video hahaha by Vikram Singh
[Today at 03:46:20 AM]


Re: ajj din di shuruat tusi kis nu dekh ke kiti,,,,, 8-> 8-> 8-> by αмεη
[Today at 03:08:31 AM]


London Brige Is Fallin Dwn Fallin Dwn , Congrats MYSELF G@BREXIT lol by kerfufle™
[June 30, 2016, 08:41:55 PM]


Free time tusi ki Karde hunde? by Gujjar no1
[June 30, 2016, 02:37:48 PM]


tusi kehrhi cheez dekh k bohut khush hunde o?? by Gujjar no1
[June 30, 2016, 02:36:05 PM]


Part #2 Song you are listening to? by The Goru
[June 30, 2016, 06:30:06 AM]


Thr€€ -- M€gic -- Words ..... ??? by The Goru
[June 30, 2016, 06:27:33 AM]


tusi bohut _______ ho ?? by The Goru
[June 30, 2016, 06:26:44 AM]


~~say 1 truth abt the person above ya~~ by D€V!L D€€P 🎩
[June 30, 2016, 04:08:18 AM]


intro by D€V!L D€€P 🎩
[June 30, 2016, 04:04:50 AM]


I'm new by sUlTaNpUrIyA cHeEmA
[June 28, 2016, 07:19:54 PM]


When was the last time you.. by The Goru
[June 28, 2016, 02:25:57 AM]


Request Video Of The Day by The Goru
[June 28, 2016, 02:17:24 AM]


Kaun Jittu Euro Cup? by Jatt Mullanpuria
[June 27, 2016, 11:30:38 PM]


Hello friends by mundaxrisky
[June 27, 2016, 05:37:31 PM]


Legendary Qwal AMJAD SABRI Shot Dead In Pakistan. by mundaxrisky
[June 27, 2016, 05:34:47 PM]


True or False by { ƤΩƝƘΩĴ }
[June 27, 2016, 11:04:13 AM]


Joke of the day by egsjpr
[June 27, 2016, 05:42:42 AM]


Quit watching TV. by Jatt Mullanpuria
[June 27, 2016, 12:05:30 AM]


My another complete project by Gujjar no1
[June 26, 2016, 01:20:51 PM]


Gurbani shabad collection by janta by ਕਰਮਵੀਰ ਸਿੰਘ
[June 26, 2016, 01:20:07 AM]


agle janam vich ki ban na pasand karoge?? by MyselF GhainT
[June 24, 2016, 02:36:01 PM]


ਪੁਰਾਣੇ ਆਮ ਬੋਲੀ ਚ ਵਰਤੇ ਜਾਣ ਸ਼ਬਦ ਜੋ ਕੇ ਅਲੋਪ ਹੀ ਹੋ ਰਹੇ ਹਨ , by sukhdeepbunty6
[June 24, 2016, 12:50:03 AM]