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.

Ethiopian opals took the price down for opals especially the mexican ones, but most of ethiopians are hydrophan, they absorb water and get transparent (colors come back after a while). The most prized remains the australians, and the rarest of them the Arlequin pattern. But some opals are less known and much rarer than all others, like the mexican Hyalite.