[privong]

> There is one other very precious thing and that is diamond, basically the same except not divisible

Diamons are a bit more complicated than that, owing to the monopolies on mining/cutting/selling (which likely artificially inflates prices) and general inability to re-sell diamonds near the cost at which they were purchased (which also keeps prices high).

https://en.wikipedia.org/wiki/Diamonds_as_an_investment

[pzone]

The monopoly aspect of the diamond market is a pretty outdated claim. It is not currently possible to synthesize large, flawless clear diamonds. The supply side (mining/cutting/selling) is largely constrained by the ability to unearth the rarest high-quality gemstones.

http://www.resourceinvestor.com/2013/04/09/diamonds-driven-m...