Webster's Revised Unabridged Dictionary · 1913

Gem

Gem , noun

[Old English gemme precious stone, French gemme, from Latin gemma a precious stone, bud.]

1.
(Botany) A bud.
From the joints of thy prolific stem A swelling knot is raised called a gem. — Denham
2.
A precious stone of any kind, as the ruby, emerald, topaz, sapphire, beryl, spinel, etc., especially when cut and polished for ornament; a jewel. — Milton
3.
Anything of small size, or expressed within brief limits, which is regarded as a gem on account of its beauty or value, as a small picture, a verse of poetry, a witty or wise saying.
Collocations (1)
Artificial gem , an imitation of a gem, made of glass colored with metallic oxide. Compare Paste, and Strass.

Gem , transitive verb

1.
To put forth in the form of buds. [Rare]
Gemmed their blossoms. — Milton
2.
To adorn with gems or precious stones.
3.
To embellish or adorn, as with gems; as, a foliage gemmed with dewdrops.
England is... gemmed with castles and palaces. — W. Irving