Rare blue allophane

From our selection of collectible minerals we propose a rare mammillated aggregate of allophane from the Mt. Copello-Reppia Mine, Ne, Genova, Liguria. Furthermore, it is characterized by an intense blue coloration that contrasts vividly with the yellow-brown matrix, by the typical mammellonary crystallization into very fine globules, and by the good concentration of the mineral on the surface, which increases its aesthetic value and mineralogical importance. The sample stands out for the quality of crystallization and for the overall aesthetic balance, with features that enhance its natural structure and visual impact. Allophane is a mineraloid, that is, a hydrated aluminum silicate lacking a long-range ordered crystal structure, with a variable formula of the type Al2O3·SiO2·nH2O. It typically forms by supergenic alteration of pre-existing silicates in water-rich environments, often in association with manganese and iron oxides, as in the Ligurian deposits linked to manganiferous mineralizations. The blue coloration, less common than the white or greenish variety, is linked to traces of chromophore elements in the mineral’s amorphous structure. This is an ideal specimen for mineral collections, display, and for those who appreciate the natural beauty of minerals, also in crystal therapy and lithotherapy, according to the properties traditionally associated with the mineral species. All minerals are 100% natural and untreated, with rare exceptions always indicated in the description. Photographs are taken with professional lighting to best enhance colors and details; however, slight variations in tone may occur depending on the device or ambient light. Shipping is carried out via reliable express couriers carefully selected, with fast delivery (in many cases 1-2 working days in Europe), tracked and insured shipping and professional and safe packing, as confirmed by customer reviews. Deliveries can also take place the day after payment depending on the destination. It is possible to combine multiple purchases and receive them in a single shipment, even from auctions with different deadlines, simply contact us to arrange combined shipping. For important pieces, direct delivery by appointment to your home or to major European trade fairs is also available. We remind you that you can view all auction pieces at the following link: www.catawiki.com/it/u/16653967 Follow us also in live auctions every Monday and Friday at 20:55! If you would like to view videos, request additional information, or satisfy some curiosity about the pieces in CataWiki’s special auctions, do not hesitate to contact us. You can find other contacts here: www.italmineral.com/pages/contact

估價:$1.12

查看所有物品來自Catawiki或Ethnographic