Quartz is the most abundant single mineral in the crust, so it is not of particular value unless a specimen is unusually attractive or large.
Diamond is Popular & valuble of all gemstones. Ruby is a valuble gem too.
Some wedding rings are refundable depending how valuble they are. If very valuble it is not refundable if not valuble not refundable.
A friend (Friendship) is valuble to a Friend because, they may be loving themselves as sisters.
Not valuble
A dolphin.
Gold
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Probably a diamond.
The plural of quartz is quartz or quartzes.
Granite
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Monkeys are a valuble extinct series. Not only are they one of the smartest animals on earth they have provided scientists valuble information about the world around us.