Definition

1. Adjective:
   • Exhibiting asterism: The property of a crystal, especially a gemstone, to display a star-shaped pattern of reflected light when viewed from certain angles. This optical phenomenon is typically caused by microscopic inclusions or structural features within the stone.

Usage Examples

• Adjective:
  • The asteriated sapphire displayed a beautiful six-rayed star on its surface.
  • Asteriated gems, such as star rubies, are highly prized by collectors.
  • The mineral's asteriated effect was visible only under a strong, direct light source.

Advanced Usage

• Scientific/Technical Context: The term is primarily used in the fields of mineralogy, gemology, and crystallography to describe a specific optical property. It is not a common word in everyday conversation.
  • The gemologist confirmed the stone was asteriated, which significantly increased its value.

Variants and Related Words

• Asterism (n): The star-shaped optical phenomenon itself.
  • The asterism in this rose quartz is caused by tiny rutile needles.
• Star (as a prefix in gem names): Used commonly in gem trade names, e.g., star sapphire, star ruby, star diopside. These are specific types of asteriated gems.

Synonyms

• Star-shaped (descriptive, less technical)
• Stellated (a more general term for star-shaped, but not specific to gemology)

Notes on Meaning

• The word is highly specific and technical. Its meaning is directly tied to the visual effect of a star (asterism) in certain crystals. It does not describe the shape of the object itself, but rather a luminous pattern that appears on it.

Adjective

1. (of some crystals especially gemstones) exhibiting asterism