the best opal can be more valuable than the best rarest black diamond
The rarest type of opal is the black opal, particularly those that originate from Lightning Ridge in Australia. Black opals feature a dark body tone that enhances their vibrant play-of-color, making them highly sought after by collectors. Other rare types include white opal with a unique play-of-color and boulder opal, which is formed within ironstone rock. Overall, the combination of color, clarity, and origin significantly impacts their rarity and value.
The rarest type of coral is the Elkhorn coral.
No it isn't. The rarest is AB negative.
The rarest you can get is groudon who is a fire-machine type pokemon.
The types of Opal that i am familiar with are White Opal, Fire Opal, Boulder Opal, Black Opal, Crystal Opal, Light Opal, Doublet Opal, Triplet Opal, Common Opal, Synthetic Opal, and Immitation Opal.
iregular
normal
No. Peridot is olivine.
The rarest type of blood is O. people with O type blood can donate blood to anybody and there are very few people that have this blood type. It is extremely rare.
Some colored diamonds are extremely rare. Red and green diamonds are most rare.alexandrite is really really rareBlack Opal
O positive is the most common and AB negative is the rarest.