All gemstones are not valuable. Many gems start from 0.20$ per carat too. Mostly all opaque stones are cheap in prices and transparent stones come high in prices.
I'm pretty sure that ruby is the most valuable. :)
Gemstones are more valuable and rare and have more vibrant colors and come in more colors. There is more types of gemstones then crystals.
Unfortunately - Gemstones are not a renewable resource. However the rarity of a Gemstone is one reason they can be very valuable.
== == The most valuable rocks would be those partly comprised of the most valuable minerals such as gold, silver, and precious gemstones.
Nodules and gemstones are both mineral formations that can be found in the Earth's crust. They are both composed of minerals and can have valuable or aesthetic qualities. However, gemstones are typically more highly prized for their beauty and rarity, whereas nodules may be of more scientific or industrial interest.
They are valuable because they are rare and take a long time to process to create a good looking stone. They are classified as "gemstones".
I know that two of them are Ruby and DiamondAnother AnswerAll gemstones are valuable: hence the name gemstone. Any gemstone is valued by its size, its colour, its clarity and its cut. There is no standard answer to this general question.However, to the stones named above, you could add emerald and sapphire.
They are valuable because they are rare and take a long time to process to create a good looking stone. They are classified as "gemstones".
Gemstones are crystalline of minerals which can be cut and polish. Synthetic stones are chemically fabricated product, in my view we can not call it synthetic gemstones they are pure synthetic products.
Natural diamonds are more valuable than manufactured diamonds, most of which are made for industrial applications, not for use as gemstones.
Natural Gemstones prices are always high in comparison to created gemstones. Natural gemstone retain the energy of earth and created gems of laboratory. Astrologically only natural gemstones gives benefits.
The most valuable gemstones are the clear, crystalline form of the harder minerals such as diamond, corundum, tourmaline, topaz, and garnet. Other minerals with exceptional clarity or color, and even some rock types are known commercially to be valuable as gemstones, but hardness is a key to frequent wearability.