News

Spiral structure in a Colombian emerald
Spherical gas bubbles in a cavity filled with epoxy resin in a Colombian emerald.
Micrographs

Spherical gas bubbles in a cavity filled with epoxy resin in a Colombian emerald.

Read
Heat-treated bicolour sapphires from Shandong Changle, China
Micrographs

Heat-treated bicolour sapphires from Shandong Changle, China

Read
Epigenetic polycrystalline boehmite nestled in a fissure of an unheated purple metamorphic sapphire
Micrographs

Epigenetic polycrystalline boehmite nestled in a fissure of an unheated purple metamorphic sapphire

Read
Inclusions de cinabre dans une opale éthiopienne
Publication

Cinnabar Inclusions in Ethiopian Opal

Read
Une coupe ethiopienne en corne de rhinoceros
Publication

An Ethiopian cup in rhinoceros horn (1/2)

Read
Coupe éthiopienne en corne de rhinocéros
Publication

An Ethiopian cup in rhinoceros horn (2/2)

Read
An exceptional 9.89 carats photochromic zircon
Publication

An exceptional 9.89 carats photochromic zircon

Read
A jewel with a large number of flux-grown synthetic rubies
Publication

The unusual case of a jewel with a large number of flux-grown synthetic rubies sold as natural rubies

Read
Synthetic flame-fusion colour-change sapphire seen under laser excitation
Micrographs

Synthetic flame-fusion colour-change sapphire seen under laser excitation

Read
Amazing synthetic flame-fusion synthetic colour-change sapphire seen under laser excitation
Micrographs

Synthetic flame-fusion synthetic colour-change sapphire seen under laser excitation

Read
HPHT synthetic yellow diamond, luminescence under strong SWUV irradiation
Micrographs

HPHT synthetic yellow diamond, luminescence under strong SWUV irradiation

Read
Pyramidal tops of quartz embedded in beige chalcedony
Micrographs

Pyramidal tops of quartz embedded in beige chalcedony

Read