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Calculating a fist-sized diamond
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<blockquote data-quote="EzekielRaiden" data-source="post: 8371841" data-attributes="member: 6790260"><p>A fist is roughly a cup in volume, or about 237 cubic centimeters. Diamond has a density of 3.51 g/cm^3, so a fist-sized diamond would have a mass of about 237*3.51 = 830 g. One carat is 0.2 g, so we can estimate that a diamond at fist size <em>after</em> cutting would be approximately 4150 ct. That's about 30% bigger than the <em>raw</em> Cullinan Diamond was, and <em>that</em> diamond got cut up into several smaller diamonds; the largest single diamond cut from it, the Great Star of Africa which adorns the top of the Royal Sceptre of the United Kingdom (part of the Crown Jewels), is a mere 530 ct, about 1/8th the size of our hypothetical fist-sized diamond. The Great Star of Africa is estimated to have a worth of over $400,000,000, though we only have estimates because it is unlikely to ever go up for sale or auction.</p><p></p><p>A cut diamond about eight times larger than the single largest cut diamond known on Earth? We have no real way to judge its value. On Earth, it would be effectively priceless--or, rather, worth literally whatever the person who wanted it most was willing to pay for it, making its currency value entirely arbitrary.</p><p></p><p>In the context of 5e? A fist-sized diamond is worth whatever the books say it is, because we have no idea how common or rare large gemstones are. Realistically speaking, gemstones appear to be fantastically more common in the Forgotten Realms than they are on Earth, because <em>unlike</em> Earth, you have a process that completely <em>consumes</em> gemstone-quality gems. The vast majority of gemstone-quality gems on Earth either get locked up in fancy places (like the aforementioned Crown Jewels of the UK), or become adornments on the bodies of various rich people across the years, depending on who can afford to buy/lease them.</p><p></p><p>Unless there's some sort of extra source of gemstones, FR and various other settings should have rapidly <em>run out</em> of them centuries ago, given the sheer number of highly active spellcasters consuming them as spell components or in crafting magic items.</p><p></p><p>Edit:</p><p>I'm genuinely curious. Where did you get the idea that the diamond for <em>true resurrection</em> has to be "fist-sized"?</p></blockquote><p></p>
[QUOTE="EzekielRaiden, post: 8371841, member: 6790260"] A fist is roughly a cup in volume, or about 237 cubic centimeters. Diamond has a density of 3.51 g/cm^3, so a fist-sized diamond would have a mass of about 237*3.51 = 830 g. One carat is 0.2 g, so we can estimate that a diamond at fist size [I]after[/I] cutting would be approximately 4150 ct. That's about 30% bigger than the [I]raw[/I] Cullinan Diamond was, and [I]that[/I] diamond got cut up into several smaller diamonds; the largest single diamond cut from it, the Great Star of Africa which adorns the top of the Royal Sceptre of the United Kingdom (part of the Crown Jewels), is a mere 530 ct, about 1/8th the size of our hypothetical fist-sized diamond. The Great Star of Africa is estimated to have a worth of over $400,000,000, though we only have estimates because it is unlikely to ever go up for sale or auction. A cut diamond about eight times larger than the single largest cut diamond known on Earth? We have no real way to judge its value. On Earth, it would be effectively priceless--or, rather, worth literally whatever the person who wanted it most was willing to pay for it, making its currency value entirely arbitrary. In the context of 5e? A fist-sized diamond is worth whatever the books say it is, because we have no idea how common or rare large gemstones are. Realistically speaking, gemstones appear to be fantastically more common in the Forgotten Realms than they are on Earth, because [I]unlike[/I] Earth, you have a process that completely [I]consumes[/I] gemstone-quality gems. The vast majority of gemstone-quality gems on Earth either get locked up in fancy places (like the aforementioned Crown Jewels of the UK), or become adornments on the bodies of various rich people across the years, depending on who can afford to buy/lease them. Unless there's some sort of extra source of gemstones, FR and various other settings should have rapidly [I]run out[/I] of them centuries ago, given the sheer number of highly active spellcasters consuming them as spell components or in crafting magic items. Edit: I'm genuinely curious. Where did you get the idea that the diamond for [I]true resurrection[/I] has to be "fist-sized"? [/QUOTE]
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