colt
If your question is really, "What is the most valuable karat purity of gold?" then the answer is 24 karat, which is 99.99% pure gold, which is the most valuable form of gold in terms of turning gold into money.
no
no
no
== == The most valuable rocks would be those partly comprised of the most valuable minerals such as gold, silver, and precious gemstones.
That would most likely be an 1847 Victoria gold Sovereign restrike. A "restrike" is a coin struck at a later date using the original dies.
its beauty and density
deed
Gold
Gold
Gold and silver