This collection presents mostly « rare gems » or « collector gems », more often not used in jewellery because of rarity or hardness. Rarity is due to  the quantity available, or a rare color, source or inclusion, or the difficulty to cut the rough into a faceted gem. Microphotographies are taken with an old Olympus microscope and an iphone. These gems are not for sale, but some extra specimens may be available. The collection is visible but stored in a specific location, so please contact me for an appointment.

Natural « wild » pearls of good quality are extremely rare. In 1893 Mikimoto Kōkichi created the first culture pearl. Most of pearls on the market are culture pearls. The sea pearls are obtained by introducing an artificial plastic nodule inside the oyster, which produces motther-of-pearl around it. The freshwater pearls are mostly produced by introducing a nodule made of earth, or a piece of flesh of another shell. The color of the pearl is the color of the inside of the shell variety. Tahitian area producesgrey, chocolat, green, peacok and the rare full black. The Southern Sea produces the famous and sought after golden pearls. Freshwater have many different colors like iridescent or the pink Edison. The japanese Akoya are white but can be lab-irradiated and besome peacok. The value of pearls depends on the color, the size, the luster, the blemishes and perfection of the form. The rarest pearls are rarely seen in Jewellery because of the extreme price of these pearls. The Conche pearls are pink, the best ones with a beautiful « fire », the quahog pearls (non nacreous) from white to purple, and one of the rarest and most expensive is the orange Melo pearl with fire. But the rarest of all pearls is the Nautilus pearl, only a view known in the world.