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The quartz is usually the least valuable gem... but if you are thinking in a precious gems sense... I believe that cubic zirconium would be the least valuable. even though it isn't one. This is because the diamond is the most precious, pearl the next, and i think that the birthday stones (emerald, sapphire, etc.) tie for third. Take what you want from this explanation and I hope I helped.
What else can I help you with?
What is another word for valuable stone?
Gem
What is descending order?
largest to smallest most valuable to least valuable oldest to youngest greatest to least
What is the least valuable diamond?
Small -- less than one carat, poorly cut stones with visible inclusions, are not very valuable
How much is a 10ct round fancy black AAA grade diamond worth?
Whatever you have to sell is worth whatever someone will pay you for it. Best practices dictate that you take your gem to a certified gemologist who can document the characteristics of the gem. It's carat weight, its clarity, colour and cut. This professional evaluation will determine whether or not the gem has been treated or otherwise altered from its natural state, which would devalue the gem. A natural black diamond of this size will be exceedingly rare and costly. You may own a carbonado gem, which would be more common and less valuable.
How much is a gold gem worth?
There is nothing called a "gold" "gem". Something is either made of gold or it is a gem, but it is not both.
