Interesting Metallic Platelets in a Brazilian Paraíba Tourmaline
Microscopic observation unveils the first known instance of skeletal metallic inclusions in Brazilian Paraíba tourmaline.
Rainbow Mountain in Natural Diamond
An iridescent feather inclusion in natural diamond bears resemblance to Rainbow Mountain in Peru.
An Iridescent “Insect Wing” in Diamond
A feather inclusion with iridescence caused by thin-film interference in diamond resembles an insect wing.
Triplite Inclusions in Quartz from Yaogangxian, China
Pinkish orange crystal inclusions in a faceted quartz are identified as the rare phosphate mineral triplite.
Patchy Yellow Trigon
Isolated nitrogen confined to the outer surface of a 0.98 ct diamond causes “yellow skin.”
Night Sky in Yellow Sapphire
Fiber-optic light creates a night sky scene in a yellow sapphire from Madagascar.
Internal World of Aquamarine from Xinjiang
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