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Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. At room temperature and pressure, another solid form of carbon known as graphite is the chemically stable form of carbon, but diamond converts to it extremely slowly. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are used in major industrial applications such as cutting and polishing tools. They are also the reason that diamond anvil cells can subject materials to pressures found deep in the Earth.
Because the arrangement of atoms in diamond is extremely rigid, few types of impurity can contaminate it (two exceptions are boron and nitrogen). Small numbers of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (defects), green (radiation exposure), purple, pink, orange, or red. Diamond also has a very high refractive index and a relatively high optical dispersion.
Most natural diamonds have ages between 1 billion and 3.5 billion years. Most were formed at depths between 150 and 250 kilometres (93 and 155 mi) in the Earth's mantle, although a few have come from as deep as 800 kilometres (500 mi). Under high pressure and temperature, carbon-containing fluids dissolved various minerals and replaced them with diamonds. Much more recently (hundreds to tens of million years ago), they were carried to the surface in volcanic eruptions and deposited in igneous rocks known as kimberlites and lamproites.
Synthetic diamonds can be grown from high-purity carbon under high pressures and temperatures or from hydrocarbon gases by chemical vapor deposition (CVD). Imitation diamonds can also be made out of materials such as cubic zirconia and silicon carbide. Natural, synthetic and imitation diamonds are most commonly distinguished using optical techniques or thermal conductivity measurements.

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  1. JLS

    Diamond core drill bit set

    I'm looking to buy a core drill bit set for professional use. I want it all in the same case as I hate having odd tools rattling around but all the sets I can find either have a 38mm and a 52mm or a 42mm and a 52mm but none have all three. I don't get the rationale behind this but does anyone...
  2. GQuigley67

    Diamond core drill

    In need of a new drill after my friend has completely ruined my dewalt, burnt out on motor side and wouldn't be worth repairing my guy who fixes them said! Looking at. Macrist DDM1 but it has some bad reviews, anyone have one??
  3. 3

    Brand new for April 2016 : Launch of box sets for diamond core tile drills holes

    Brand new for April 2016. Launch of boxsets for drilling holes into very hard porcelain tiles. Two sets have been revamped. The third is completely new. This boxset is based on our best selling bathroom fitters kit the "All in one solution" A slimline 600g set...
  4. S

    F & E tank for Elson Diamond

    I have had severe problems with sludge in my CH system. The sludge has now been cleaned out and to try and prevent this happening again I gave the system a dose of inhibitor. This was fine for a few days but then I started getting a strong smell from the hot water. The water tank is an Elson...
  5. 3

    Central London stockist of PORSADRILL diamond core tile drills for hard porcelain.

    E. K. Wilson of London is a prefered stockist of PORSADRILL diamond core tile drills. If you need ********* core drills in central london then head on over to see E.K.Wison. SW7 3LQ Call 020 7589 0046 and ask for Sandy. 86 South...
  6. M

    Coredrills

    Has anybody used one of these? DeWalt D21570K-GB Silver Bullet 1300W 127mm Diamond Drill 230V | Corded Diamond Core Drills | Screwfix.com What they like? I have a job coming up soon and I need to core through a massive great wall and I think it will kill off my sds drill so need to look at...
  7. 3

    Ultimate Box Set - 30 Diamond Tile Drills and cores HUGE selection of sizes. 365Drill

    The most popular box set we have ever produced. A big hit with installers . 30 Diamond cores in a large heavy duty case complete with all tools. Keep all your diamond cores together. Easy to spot colour...
  8. 3

    Essential Box Set - 12 Diamond core drills in the most popular plumbing sizes. 365

    12 Diamond cores perfect for essential UK and international pipe sizes. Plus your fixtures and fittings. What's included in this 1KG boxset ? What is it ? What is it used for ? 4 x 6mm For Red...
  9. 3

    Quality Diamond Holesaws drills for very hard porcelain tiles now in PRESTON PR1 1PR

    After four hours of driving from London we reached Preston. And Installed the PORSADRILL diamond core tile drilling system for very hard porcelain tiles into branch. Get a shiny new panel ready and find a space in the very crowded space of the shop. This was Electrical Point UK...
  10. jonnyswamp

    Best diamond dry core bits?

    Following on from Masoods DDM1 or DDM3 thread, I need a new 117mm core bit, there are loads out there, I would think quite a few the same just badged up different What have you got, is it any good, or what would you recommend
  11. 3

    NEWS: PORSADRILL now available online from Tile Depot (Tile Drills diamond cores)

    Now available online from Tile Depot. The Bathroom Fitters Kit from ********* Click Here to see the page PORSADRILL BATHROOM FITTERS KIT MAX now£49.99 each (incl VAT) Easy to use Perfect holes every time Save money on broken tiles 2 x 6mm drill bits 2 x 8mm...
  12. S

    which diamond drill?

    I would like to buy a new diamond drill, the two main contenders are Eibenstock EHD1300 Or Marcrist DDM1 1200w. I'm mainly using the drill to core waste pipes and soil pipes (38mm, 52mm and 117mm). So, which one is best? Kind regards Sasi
  13. 3

    Ultimate Tile Drilling Box Set diamond drilling cores for professional installers

    http://youtu.be/yrfDZk6hFeI Ever wanted to own a complete drilling solution for installing hard porcelain tiles but were put off by the high initial outlay? Well at ********* we solved the cost problem as well as the drilling problem. This hamper of goodies...
  14. B

    diamond

    anyone heard from diamond gas (steve)
  15. R

    Diamond core

    Hi guys, Can someone recommend me a 5" diamond core bit and where to get it from. Cheers
  16. 3

    Turbo Cores from ********* tile drills 8mm diamond core 365 hole saw

    So its a hot sunny Friday afternoon and we have just finished the latest batch of Turbo Cores. Ready to go into their packaging for resale. But its too hot to work today. Oh well crack on... The finished pack (this one is from the old stock). Funny though. Although we supply them...
  17. 3

    Now offering TWO displays for retailers of diamond core holes tile drills PORSADRILL

    365-Drills makers of PORSADRILL diamond core tile drills are now offering retailers two display choices. 1) The full range board. Ideal for the tile shop who wants to cater for all sizes. 2) The compact board. Ideal if the space is tight. Here they are together at the factory...
  18. 3

    WATFORD: New retailer of PORSADRILL diamond core tile drills for holes in porcelain t

    Welcome to WATFORD the latest branch to have the PORSADRILL makeover. Introducing Daniel our local in branch model.... (Dont give up your day job) Watford Address: 26 Aldenham Road Watford...
  19. R

    Diamond hits 6000 sparkling posts!

    Top posting from a top bloke! Keep them coming mate!:17:
  20. 3

    Colchester Tiles become stockists of PORSADRILL hole tile drills 365 diamond core bit

    Congratulations to COLCHESTER TILES who have become stockists of the 365-Drills brand You will be able to find the range on the shop panel which is set to be installed in branch as of May 2013 Colchester Tiles are a well established large retail outlet on the outskirts of the...
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