sun-stone

A small sun-stone glows warmly on a wooden desk.

Definition

1. Noun:
   • A mineral with sun-like properties: "sun-stone" refers to a type of feldspar mineral (such as aventurine or oligoclase) that exhibits a sparkling, reflective quality resembling sunlight, often used in jewelry.
   • A historical navigational tool: "sun-stone" also denotes a legendary or ancient crystal (e.g., Iceland spar) believed to help locate the sun's position even through clouds or fog, used by Norse sailors for navigation.

Usage Examples

• Mineral:
  • The jeweler showed me a beautiful pendant made of sun-stone. (A mineral that sparkles like sunlight.)
• Navigational tool:
  • Vikings may have used a sun-stone to find their way across the sea. (A crystal used to detect the sun's position.)

Advanced Usage

• "to use a sun-stone": to employ a crystal for navigation.

  • The explorer claimed he could use a sun-stone to orient himself on overcast days. (He relied on the crystal to determine direction.)

• "sun-stone effect": the visual phenomenon of sparkling or shimmering in a mineral.

  • The sun-stone effect in this gem is caused by tiny inclusions of hematite. (The reflective quality is due to mineral impurities.)

Variants and Related Words

• Sunstone (n): a common alternative spelling, referring to the same mineral or navigational tool.

  • Sunstone is often used in modern metaphysical practices. (The mineral is popular in spiritual contexts.)

• Sun-stone crystal (n): a specific type of crystal used for navigation.

  • The sun-stone crystal was kept in a leather pouch for safekeeping. (The navigational tool was carefully stored.)

Synonyms

• Aventurine: a type of quartz with a similar sparkling effect.
• Iceland spar: a transparent calcite crystal historically used as a sun-stone.

Related Idioms

• "A sun-stone in the fog": something that provides clarity in confusion.

  • Her advice was like a sun-stone in the fog, guiding me through the problem. (Her guidance was clear and helpful.)

• "To hold a sun-stone": to possess a tool for insight or direction.

  • He felt as if he held a sun-stone when he understood the complex theory. (He had a clear understanding.)