Article Search Results

Show Filters
Showing 118 results for "*"
This aquamarine crystal showed iridescence as it is turned under a moving light source.
Mysterious Iridescence in Aquamarine

A rough aquamarine crystal shows an unexpected phenomenon.

Read More

Bolivian ametrine crystal.
Ametrine Optical Dishes: Windows into the Effects of Crystal Structure

Optical activity is studied using a polished block of ametrine.

Read More

Large rough beryl crystal containing multiphase inclusions.
“Double Bubble” Multiphase Inclusion in Beryl

A “double bubble” of gas within gas appears in a 64.10 ct pale green rough beryl at room temperature.

Read More

Trapiche-like structure in this Kashmir ruby consists of colorless feldspar crystals, black graphite platelets, and rutile crystals.
Trapiche-Like Ruby from the Batakundi Mine, Kashmir

Trapiche-like ruby from Kashmir shows a well-formed fixed six-rayed pattern.

Read More

A guest crystal in the star sapphire viewed under cross-polarized light (left) and fiber-optic light (right).
Sapphire Inclusion with Rutile “Silk” in a Burmese Star Sapphire

Illumination techniques reveal a remarkable sapphire inclusion within a Burmese star sapphire.

Read More

Polished free-form opal encapsulating an insect.
Fossil Insect in Opal

Precious opal hosts a trapped insect.

Read More

Lath-like grandidierite mineral inclusion in sapphire.
Grandidierite Inclusions in Sapphires

Grandidierite, an unusual inclusion in sapphire, independently encountered by two laboratories.

Read More

Six-rayed stars in a yellow sapphire.
Star-Like Growth in Natural Yellow Sapphire

A natural yellow sapphire features a distinctive star-like graining pattern.

Read More

Bright yellow inclusions inside barite crystals.
Quarterly Crystal: Orpiment in Barite

Barite cluster from Nevada hosts numerous yellow orpiment crystal inclusions.

Read More

Native copper inclusions in purple chalcedony.
Native Copper Inclusions in Indonesian Purple Chalcedony

Indonesian purple chalcedony containing interesting native copper inclusions is a first for the Carlsbad lab.

Read More