inclusions

Lapis lazuli with fine pyrite inclusions. Photo by Hi-Res Images of Chemical Elements. Licensed under CC By 3.0.

Stamp seal from Assyria or Mesopotamia, Neo-Assyrian (style), late 8th-7th century BCE. Lapis lazuli with calcite inclusions, from the Los Angeles…

4.6-ct demantoid with horsetail inclusions. © Ildar Latypov Minerals. Used with permission.

Despite their name, “Herkimer diamonds” are actually doubly-terminated colorless quartz crystals found in Herkimer, NY. The…

This 79.80-ct indicolite has inclusions that make it appear like the wind-blown sea. © Ben Day Jewelers. Used with permission.

Dendritic quartz (with tree-like inclusions), citrine, and brown diamond necklace in 18k and 22k gold and oxidized silver. Photo by Alan Jackson.…

This quartz crystal has excellent transparency and black schorl tourmaline inclusions. © Rob Lavinsky, www.iRocks.com. Used with permission.…

Bright gold-colored rutile inclusions make these earrings unique. INSPIRO Delicate Dangle Earrings with Rutilated Quartz. © Martha Seely.…

Colorless quartz with a single greenish blue hexagonal apatite crystal inclusion, 10.67 cts, corner triangle cut, Minas Gerais, Brazil. © Rob…