It
En
De
Mot-clé
Gemmologie
Connaissance
Diamants
Terminologies
Les 4C
Pierres précieuses
Couleurs
Perles
Perles de culture
Traitements
Portrait
Historique
Comité
But
Devenir Membre
Actuel
Liens
Inclusions of hematite in feldspar (sunstone), India
Inclusions of fossil plant debris in opal from Wollo, Ethiopia
Partially etched diamond crystal
Fluid inclusions containing mica and quartz, in aquamarine from Pakistan
Spinel crystal in dolomite marble, Burma
Natural etching structure on a crystal face of diamond (trigons), polarised light
Inclusions of rutile (dark crystal and fine needles) and clusters of zircon grains in umbalite garnet, Tanzania
Fluid inclusions in quartz with bituminous daughter minerals, China
Stress fissure («sun spangle») in baltic amber
Two-phase inclusions in tourmaline from Namibia
Devenir membre
Contact
Interne
Imprimer page
Plan du site
Empreinte
Protection des données
Conditions d'utilisation
© SGG/SSG 2023
Nos sponsors de l'année 2023:
Devenir membre
Contact
Interne
Imprimer page