Comments by "Christina" (@MargaritaMagdalena) on "Why Black Opal Is So Expensive | So Expensive" video.

  1.  @mydogniko  Oh dear, are diamonds not special enough for you?
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  2. Lots of things are hard to find yet not expensive. Urine from Siberian tigers (only around 500 left) is pretty hard to find, yet nobody wants to pay for it. So I don't think being hard to find alone makes something valuable.
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