Which term is a series of pinpoints, clouds, or crystals that forms in a diamond's growth plane and is associated with crystal distortion and twinning planes?

Which term is a series of pinpoints, clouds, or crystals that forms in a diamond's growth plane and is associated with crystal distortion and twinning planes?

• A. Twisting
• B. Twinning Wisp (W)
• C. Twinned crystal
• D. Unit cell

Answer: (B)

This term describes a growth-plane feature that marks a twin in the diamond’s lattice. A twinning wisp is a line or sequence of tiny pinpoints, clouds, or miniature crystals aligned along the growth plane. This pattern results from a slight reorientation of the lattice across a twin boundary during growth, creating a visible distortion along that plane. It’s the specific kind of observable feature that signals crystal distortion associated with twinning, rather than a general macroscopic twist of the crystal, a whole twinned crystal, or the basic repeating unit of the lattice.

This term describes a growth-plane feature that marks a twin in the diamond’s lattice. A twinning wisp is a line or sequence of tiny pinpoints, clouds, or miniature crystals aligned along the growth plane. This pattern results from a slight reorientation of the lattice across a twin boundary during growth, creating a visible distortion along that plane. It’s the specific kind of observable feature that signals crystal distortion associated with twinning, rather than a general macroscopic twist of the crystal, a whole twinned crystal, or the basic repeating unit of the lattice.