By weight, when comparing equal amounts of platinum and diamond, gem-quality diamond will always be more expensive.
All else being equal: carat weight, cut, and clarity, a red diamond will always be more expensive than a white diamond.
Of equal weight, and of best quality, diamonds are worth more than platinum.
Stone for stone, a diamond will cost more than a sapphire.
Every diamond is valued by its clarity, colour, carat weight and cut. Compared on an equal basis, you will pay less for a black diamond.
Red diamonds are rare. The most famous red diamond, the Moussaieff Red Diamond is currently valued at US$7 million; it's a 5.11 carat stone, and the largest red diamond ever rated by the Gemological Institute of America. Read more, below.
Platinum is not more expensive than a beautiful, natural diamond.
Gramme for gramme, ounce for ounce, you'll always pay more for diamond than for platinum.
Gold is more expensive than diamond and platinum because of its scarcity. The gold standard was introduced in the 18th century by the British Parliament. The price of gold is determined by its market supply and demand.
Gram for gram, a gem-quality diamond is always more expensive than platinum. However, gram for gram, platinum is always more expensive that industrial diamonds. It is important to keep in mind that diamond prices are kept artificially high because DeBeers hides away much of the diamonds they mine to exaggerate scarcity i.e. diamonds are a manipulated market (vs. a free market).
Diamonds and platinum are both valuable and expensive commodities. The worth of one compared to the other largely depends on the quality and color.
platinum is more unique
No, by weight, a diamond has higher value than platinum.
Stone for stone, a diamond is more expensive than an emerald.
Platinum is a rarer element on the earth.
no. Platinum is more highly valued than silver.
Gold. It is more expensive according to how much mass it has inside of it.
All else being equal: carat weight, cut, and clarity, a blue diamond will always be more expensive than a white diamond.