Diamond (pronunciation: /ˈdaɪəmənd/ or /ˈdaɪmənd/) is a metastable allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at standard conditions. Diamond is renowned as a material with superlative physical qualities, most of which originate from the strong covalent bonding between its atoms. In particular, diamond has the highest hardness and thermal conductivity of any bulk material. Those properties determine the major industrial application of diamond in cutting and polishing tools and the scientific applications in diamond knives and diamond anvil cells.
Because of its extremely rigid lattice, it can be contaminated by very few types of impurities, such as boron and nitrogen. Small amounts of defects or impurities (about one per million of lattice atoms) color diamond blue (boron), yellow (nitrogen), brown (lattice defects), green (radiation exposure), purple, pink, orange or red. Diamond also has relatively high optical dispersion (ability to disperse light of different colors).
Most natural diamonds are formed at high temperature and pressure at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth's mantle. Carbon-containing minerals provide the carbon source, and the growth occurs over periods from 1 billion to 3.3 billion years (25% to 75% of the age of the Earth). Diamonds are brought close to the Earth's surface through deep volcanic eruptions by magma, which cools into igneous rocks known as kimberlites and lamproites. Diamonds can also be produced synthetically in a HPHT method which approximately simulates the conditions in the Earth's mantle. An alternative, and completely different growth technique is chemical vapor deposition (CVD). Several non-diamond materials, which include cubic zirconia and silicon carbide and are often called diamond simulants, resemble diamond in appearance and many properties. Special gemological techniques have been developed to distinguish natural diamonds, synthetic diamonds, and diamond simulants. The word is from the ancient Greek ἀδάμας – adámas "unbreakable".

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  1. C

    Wharfedale Diamond 9.1, bass replaced

    I'm thinking of buying a pair of Wharfedale Diamond 9.1 speakers. The bass unit on one was apparently damaged and both have been replaced with Peerless sds p830656. The owner says they sound just as good, if not better than the originals. Any thoughts? They are inexpensive (under £30), but...
  2. alchemystical

    For Sale Diamond Mobile Phone Numbers. His + Hers, Matching Pair

    Matching pair of numbers. The XXX parts are aesthetic as well with 2 repeated digits. Perfect for business or relationships where you want that wow potential. £2000 for the pair, sound fair?
  3. K

    Speaker tweeters

    Wharfedale diamond 9...can a tweeter be half broken? Listening to both I notice one speaker seems a little muffled. I have wired just to the tweeter an one is definitely less crisp and a little quieter. I have checked the cable phasing. Do can a tweeter half fail causing this? If the tweeter...
  4. S

    Marantz PM6004 to Wharfedale Diamond sub issue.

    Hello, Anyone suggest a reason why a cd played through my speakers/amp /sub woofer produces perfect sound while the same amp / turntable only produces sound through my speakers but not the sub ? Thanks for any advice
  5. K

    Wharfedale diamond 10.1 no sound from main speaker

    Hi The speakers have suddenly stopped working after continued use for about 3 hours The sound only comes from the tweeters. I have checked and changed the speaker wires and have also checked that the amp works with other speakers Are there any checks I can do to test them? The speaker...
  6. L

    Wharfedale Diamond 11.3 repairs?

    Hi. I’ve got a trusty pair of diamond 11.3’s as front speakers in my setup I’ve just moved house, and in the move one of the terminals on the back of one of the speakers has broken / been damaged so I am unable to connect the speaker wire to it. Is it possible to get his repaired / replaced...
  7. S

    Issue with wharfedale diamond 9.1

    Hi all, 2 years ago I purchased my Denon AVR-X2700H and a set of Wharfedale Diamond 9.1, 9CS and SW150 as a new years treat. Within a month, I had an issue with one of the 9.1s where it sounded buzzy at certain frequencies, usual talking. They replaced the speakers, and worked fine since...
  8. tiruri

    Question Amp for Wharfedale Diamond 9.2 - so lost

    Hello, my current installation is the following. I have an old Logitech z-5500 and I have removed all the satellites, and I have connected the two Diamond 9.2 to it and the truth is that it is not bad in terms of power, but I understand that it could improve a lot, especially in terms of sound...
  9. DoubleH

    Diamond 230 upgrade

    Hi all. I'm looking to upgrade my current speakers and amp. I'm currently using a Yamaha AS201 and a set of diamond 230's. I originally had the diamond 220s which honestly sounded great in our old house but our new living room is much bigger (4.2m x 6m) and the 220s sounded dead in here. The...
  10. Promoted Content Poster

    Promoted Bowers & Wilkins 800 Series Diamond: The Loudspeakers Helping Create Your Favourite Music

    British audio brand Bowers & Wilkins is renowned the world over for crafting its products with one goal in mind: to create the best-sounding loudspeaker. Their flagship 800 Series Diamond is the ultimate example of this approach. In the iconic Abbey Road Studios, the 801 D4 is used daily in the...
  11. Ayrton

    KEF eggs Vs Wharfedale Diamond 9

    In my living room I have a Denon AV receiver driving 5 Wharfedale Diamond 9 speakers and a Sw150 subwoofer. I wanted better stereo so I've just added a Marantz PM6007 amp (it's luuuuurvely 😁) To use it I have unplugged the front 9.1's and plugged them into the Marantz. However when folk want...
  12. Ayrton

    Wharfedale Diamond 9.1 and banana plugs

    Do these speakers take them? Do those little coloured tips come out of the screw tops? I don't want to risk mangling anything if they don't. The leaflet that comes with them doesn't have the word 'banana' in it
  13. mitchverrier85

    Denon x2800h set up help

    Hiya, So ive just got a new Denon x2800h and im wondering about the settings/calibration. (im new to this) so i mainly like to listen to music, youtube etc... i currently have a 5.1 set up consisting of 4 wharfdale diamond 220 bookshelf, 220c Centre and the diamond SW150. Could anyone help me...
  14. Ian Collen

    NEWS: Bowers & Wilkins launches 800 Series Signature speakers & comments

    The 801 D4 and 805 D4 from its 800 Series Diamond range are the latest loudspeakers to get upgraded to Bowers & Wilkins' illustrious Signature status. Read the news.
  15. Ertut1

    Amplifier for the Wharfedale diamond 220

    Hi I dont really know a lot about audio. So i am not sure about amplifier? I have bought the Wharfedale Diamond 220 since their reviews are pretty good and they got recommended to me. My budget isnt that big so I was looking at amplifiers for around 50 to 75 dollars. I found two: Fosi Audio...
  16. georgiek

    Looking for AMP for my Wharfedale Diamond 10.7's

    Hey everyone, I own the Diamond 10.7's which are the biggest tower speakers of the 10x line (I guess) ( Wharfedale Diamond 10.7 loudspeaker Specifications ) - they're 6 Ohms I am looking for an amp in the 800-1200€ area. I've shortlisted: Cambridge Audio CXA81 Rotel a12 or a14 mk2 Audiolab...
  17. T

    Which center channel should i buy?

    Hi everyone. I have recently bought some Wharfedale diamond 12.1s as my front left and right and i would like to partner them with a good compatible centre. I have been looking at the 12.c, which I can get for 240€, but I have also found some used 11.cs for 140€. So is the 12.c worth the extra...
  18. Phil Hinton

    VIDEO: BMW iX M60 with Bowers & Wilkins Diamond Surround System - Discussion thread

    We are given the opportunity of a week-long loan of the brand new BMW iX M6O Electric Vehicle that has the Bowers & Wilkins Diamond Surround System fitted as standard. So, is this the best car Hi-Fi we have ever heard? Watch our video review...
  19. L

    Tibo Harmony Sub 8 or Wharfdale Diamond SW-150?

    An old Tannoy SFX 5.1 has died so in the market for a budget sub to replace it. This is not my main setup so I’m really sticking to a budget. It’s just needed for casual TV/films, music and some gaming. Initially I looked at second hand subs but can’t really find anything below £100, and am a...
  20. Davekale86

    Wharfedale diamond 220

    Picked these up for the bargain price of £50 just wondering what the metal plate is for connecting the speaker posts? Was listening to music and they sounded funny but put the metal plate back on as it was loose and sounded much better Tia
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