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সাইটের অন্য পাতায় এই শব্দগুলো

• They are the same mineral — beryl. Traces of chromium or vanadium make it emerald green; traces of iron make it aquamarine blue.

  aquamarine — dictionary →

• Only beryl coloured green by chromium or vanadium, and deep enough in colour, is sold as emerald — paler stones are called green beryl and are worth far less.

  beryl — dictionary →

• Both are corundum — a trace of chromium turns it red and it is then called a ruby, while corundum of every other colour, including pink, yellow and colourless, is called sapphire.

  corundum — dictionary →

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