moss agate

Thân thiện

A polished moss agate rests on a geologist's open palm.

Definition

1. Noun:
   • A type of agate resembling moss: "moss agate" is a semi-precious gemstone, a variety of chalcedony (a type of quartz), characterized by its translucent background with inclusions that resemble moss, foliage, or other organic forms. These markings are typically brown, black, or green.

Usage

• Noun: Used to refer to the gemstone itself, either in its raw mineral form or when cut and polished for use in jewelry or decorative objects.
  • The jeweler set a beautiful piece of moss agate into a silver ring.
  • Collectors value moss agate for its unique, natural patterns.

Advanced Usage

• Descriptive Use: The term can be used descriptively to highlight the stone's visual qualities.
  • The vase had a moss agate finish, with swirling green and white patterns.

Variants and Related Words

• Agate (n): The broader category of banded chalcedony quartz to which moss agate belongs.
• Chalcedony (n): The microcrystalline form of quartz that includes agates, jaspers, and other similar stones.
• Dendritic agate (n): A closely related type of agate containing tree- or fern-like inclusions, often used interchangeably with "moss agate" though some distinctions are made by mineralogists.

Synonyms

• Mocha stone: An alternative name, historically used, for moss agate.
• Dendritic agate: (See Variants and Related Words).

Notes on Meaning

• The defining characteristic of "moss agate" is its appearance. The "moss" is not biological but consists of mineral inclusions, often of manganese or iron oxides, that crystallize within the silica gel to form dendritic (branching) patterns. It is prized as a gem material for its unique and natural beauty.

Học thuật

Noun

1. an agate resembling moss with brown, black, or green markings