Our list includes many gemstones that are not commonly found in jewelry because of how hard they are to be faceted and found. Pricing of rare gemstones will always be dictated by demand. The average person is completely unaware of these esoteric gemstones making demand less than it should be.
Collectors, and museum curators are usually knowledgeable when it comes to rarity. Size and clarity are among the elements of Rarity, that can have an exponential effect on any stone’s ranking. We limited consideration for these two elements in our ranking system.
We believe that every gemstone’s degree of rarity depends on two critically connected elements: Availability & Market Desirability. At all times, this concept of market desirability must be considered through a lens of an informed collector. For example, an informed collector knows: Marketing can influence a person to want anything. Jewelry that is beautiful and fashionable does not translate into true value. Just because a gemstone is very limited in availability, does not mean it will be desirable if it looks ugly.
Availability defined: The degree in which a gemstone can be readily obtained. Market Desirability defined: The characteristics that a gemstone possess that are desired by an informed collector. The Most Rare Stones will always have: Low Availability + High market desirability. Here are examples of how availability and market desirability interact.