A baroque-shaped shell blister is examined at the Mumbai laboratory.

Examination of a purple sapphire reveals a zigzag-patterned fingerprint and negative crystal resembling a butterfly.

Whitish hairlike inclusions are present throughout a 3.55 ct benitoite.

Illumination under the microscope reveals iridescent healed fissures in a yellowish brown epidote.

A Y-shaped channel with finer branches indicates parasitic activity in a natural saltwater pearl.

Radial limonite displays bright interference colors in a surface-reaching fracture of a violet sapphire.

Fire agate from Mexico displays a random weblike pattern.

Patchy cloud in a diamond resembles a celestial star.

A tourmaline inclusion in a Kashmir sapphire contains “daughter” crystal inclusions.

“Pearls”; “Terra Spinel Terra Firma”; “Colour of Paradise: The Emerald”; “Twentieth-Century Jewellery: From Art Nouveau to Contemporary”; “Jewellery from the Orient: Treasures from the Bir”