Examination of smoky quartz from Inner Mongolia reveals rare arsenopyrite inclusions.

A variety of chalcedony from Indonesia displays a multitude of blue, green, and metallic inclusions.

Tiny crystal and particle cloud inclusions resemble a galaxy in a 2.01 ct diamond.

Vibrant blue apatite inclusions are observed in a garnet sample from an undisclosed source in Africa.

Thin-film inclusions and triangle-shaped fissures are discovered in the fibrous arms of trapiche-like sapphire samples.

A laurentthomasite rough sample from Madagascar displays an abundance of hexagonal etch features.

Diamonds for Peace conducts basic training on rough diamond grading for artisanal miners in Liberia.

A report on a new blue variety of amblygonite-montebrasite from Rwanda.

FTIR spectroscopy shows that the existence of carbon dioxide gas bubbles in a negative crystal in sapphire is no longer proof of the absence of heat treatment.

A look at new gem material from the iridescent andradite deposit in Sonora, Mexico.

A newfound dinosaur site in the Hell Creek Formation of South Dakota leads to the discovery of pyritized triceratops fossils.

Black beryl beads display six-rayed and twelve-rayed stars.

Pleochroic colors caused by cyclic twinning produce a kaleidoscope effect in alexandrite.

A 2.88 ct Colombian emerald plays host to a metallic yellow pyrite crystal.

Sail-shaped etch features provide proof that a sample sold as aquamarine is actually a spodumene crystal.

Zircon, monazite, and apatite inclusions surrounded by yellow halos are observed in an iolite cabochon.

Numerous two-phase inclusions form a cross in a rock crystal pendant.

An inclusion with a metallic luster is observed in a pinkish orange padparadscha sapphire.

A Fancy Light gray diamond hosts numerous metal sulfide crystals.

青金石是一种岩石，也就意味着它是多种矿物的聚晶。 这种古老的宝石包含三种矿物：天青石、方解石和黄铁矿，但各自的含量不同。 有时，它也包含以下一种或多种物质：透辉石、闪石、长石和云母。