Research Article Search Results

Four-billion-year-old meteorite carved into a life-sized human skull draws attention at the 2022 AGTA show.

The first installment of this column explores the potential role of modern-day deep-focus earthquakes on diamond growth.

One of the more subtle inclusion scenes gemologists sometimes observe in natural diamonds is the presence of crystallographically oriented structural defects known as “internal graining.”

A gemological analysis of blue Burmese sapphires from Mogok, based on a series of field expeditions over the last decade.

The Tokyo lab recently identified a unique localized distribution of cloud-like inclusions in a chrysoberyl.

Examines the mining and the internal, spectroscopic, and chemical features of peridot from this deposit, which possesses a rich olive green color and is available in large sizes.

Remarkable “horsetail” inclusions discovered in a demantoid garnet, while their origin and composition remain under discussion.

A reported new source of blue zircon in Malawi yields rough material for beautiful finished stones in the gem trade.

Nacreous pearls are known to have platelet growth resembling fingerprints or topographic maps, but a less common appearance is nacre with a concentric spiral pattern.