Labradorite: alternatives and connections

A mineral of the feldspar family, triclinic in crystallization, and in composition a silicate of alumina and soda. It is a common cons…

Of or pertaining to algology; as, algological specimens.

A mineral of the feldspar family, commonly occurring in small glassy crystals, also a constituent of some igneous rocks. It is a lime…

A hard, compact variety of mineral coal, of high luster, differing from bituminous coal in containing little or no bitumen, in consequ…

An artificial pond, or a globe or tank (usually with glass sides), in which living specimens of aquatic animals or plants are kept.

A beautiful person, esp. a beautiful woman.

A beautiful child; -- so called because artists have represented cherubs as beautiful children.

The act or process of collecting or of gathering; as, the collection of specimens.

To inflect according to the degrees of comparison; to state positive, comparative, and superlative forms of; as, most adjectives of on…

A genus of small, hardy trees, including the hawthorn, much used for ornamental purposes.

A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness.

To divide or separate, as into classes, orders, kinds, or species; to classify; to assort, as specimens, letters, etc.

To collect specimens in the study of entomology.

Calcium fluoride, a mineral of many different colors, white, yellow, purple, green, red, etc., often very beautiful, crystallizing com…

Work adorned with frets; ornamental openwork or work in relief, esp. when elaborate and minute in its parts. Hence, any minute play of…

To play wild pranks; to play tricks of levity, mirth, and gayety; to indulge in frolicsome play; to sport.

use of chemical analysis to estimate the age of geological specimens

The act of closing the teeth and showing them, or of withdrawing the lips and showing the teeth; a hard, forced, or sneering smile.