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diamond
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, but diamond almost never converts to it. Diamond has the highest hardness and thermal conductivity of any natural material, properties that are utilized 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 being 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 relatively high optical dispersion (ability to disperse light of different colors).
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 minerals and replaced them with diamonds. Much more recently (tens to hundreds 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 gas 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.
Burris Black Diamond is in perfect condition, never used but open box. No markings or damage, lens is crystal clear!
Can ship on buyers dime, please message with shipping address for quote. No trades. Specs are: 30mm 4x-16x-50mm Item No. 200955 $400.00
New in the box. I can ship, the buyer pays for shipping.
https://vortexoptics.com/vortex-diamondback-tactical-4-16x44-ffp-riflescope+reticle-EBR-2C~MOA
I'm in a pinch and need to sell. I've priced things pretty well, but please let me know if the prices are unreasonable. The ad is OBO.
-Daro...
I have a 14k solid gold Diamond cut rope chain,it’s bout 24”.
It’s in great shape.
We can meet at gold shop for testing.Meet in Beaverton area.
Thanks for looking.
Have a brand new YHM handgaurd in carbine length. It was mounting in a new rifle that has never been fired. Come with barrel nut and all hardware.
$100 cash only
More info: https://yhm.net/accessories/ar-15-handguards-forearms/diamond-series/7-290-black-diamond-series-forearm-carbine-length/
Selling my diamond bow, it’s set at 70lbs has a 28” draw. Comes with hard case, arrows, practice tips, broad heads, and new knocks. Asking $250 for everything, the bow is about 5 years old. String is still in good shape and has never been dry fired.
For Sale is a Kahr PM9 “Black Diamond” in 9mm and mfg in 2006. Factory Box, paperwork and (2)-6rd mags. Has a 3.1” barrel and night sights. Will Ship. Asking $375
For Sale is Kahr PM9 “Black Diamond” in 9mm. Sub-Compact with 3.1” barrel. Comes with factory box, papers, night sights and (2)-6rd mags. Will Ship. Asking $395
I put this on a DMR build, maybe 100 rounds downrange, then decided to go a different direction.
Trigger works great. Having used just about every drop in unit…Triggertech products are, in my opinion, the best. That being said, this trigger no longer has a home and it’s money that can be used...
Beautiful 14K white gold wedding ring. Diamond weighs .67 carat (lab grown), surrounding diamonds weigh separately. Never used, never worn, original paperwork/diamond info in hand. Cash only, original price was $2,247, yours for $750. Contact me via PM.
Anyone know if the boat ramps are still useable this weekend? Was thinking about one last trip for the year. ODOT cams show snow on the ground but the roads look clear .