Yeah AZ!! You are correct!
Some gems are even rarer than this. A few are so rare that only two or three examples are known to exist. One factor collectors take into consideration is the site the material came from. With this in mind, you have still more exceptionally rare gems. For example, peridot is a fairly common mineral that is found in several parts of the world. However, there are a few carats of peridot that were found in a meteor. Extraterrestrial peridot is a very rare gem indeed!
Possibly the most unusual peridot is that which comes from meteorites called pallasites. Some have even been facetted and set in jewelry, the only extraterrestrial gemstones known to man.
A pallasite is a type of stony-iron meteorite. It consists of cm-sized olivine crystals of peridot quality in an iron-nickel matrix. Coarser metal areas develop Widmanstätten patterns upon etching. Minor constituents are schreibersite, troilite and phosphates. Pallasites were once thought to originate at the core-mantle boundary of differentiated asteroids that were subsequently shattered through impacts. An alternative recent hypothesis is that they are impact-generated mixtures of core and mantle materials. They are named for the German naturalist Peter Pallas (1741-1811), who located in 1772 a specimen near Krasnojarsk in the mountains of Siberia that had a mass of 680 kg. The Krasnojarsk mass described by Pallas in 1776 was one of the examples used by E.F.F. Chladni in the 1790s to demonstrate the reality of meteorite falls on the Earth, which were at his time considered by most scientists as fairytales. This rock mass was dissimilar to all rocks or ores found in this area (and the large piece could not have been accidentally transported to the find site), but its content of native metal was similar to other finds known from completely different areas.
HERE'S A PIC OF PALLASITE