Neither. Diamonds are minerals and one of the hardest substances known, so it can't be struck into coins. Platinum is a metal, but circulating coins are made of base metals like copper, nickel, aluminum, etc. Gold, silver, and platinum are used only for coins made for sale to collectors and investors.
Platinum is used, because it is ideal for diamonds and other gemstones.
diamonds?
Yes, you can get the the 1.15CT emerald and princess cut diamonds engagement ring with a platinum setting.
Platinum Bullion coins are produced at the Philadelphia Mint and West Point Mint.
Can metal really be compared to rock? I'd say diamonds, but what do I know.
Sure. You can insert diamonds in a platinum ring as easily as in gold or silver. Updated Platinum is actually ideal for holding diamonds. It's durable and has been used for a long time in jewelry, which equals rings that jewelers are knowledgeable about crafting, and a metal that will reliably hold the stone.
Of equal weight, and of best quality, diamonds are worth more than platinum.
Gold, platinum and diamonds.
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Yes, diamonds can be set in platinum, silver, stainless steel and palladiam.
Gold, platinum and diamonds.
Mine. A fortune. But it has diamonds sapphires etc.