1. set with or adorned with gems; studded with precious stones
Usage: literary or formal
2. resembling or having the qualities of a gem; bright and precious
Usage: literary

Examples

• The crown was a gemmy creation, glittering with rubies and diamonds.
• She wore a gemmy brooch that caught the light beautifully.
• The gemmy waters of the tropical lagoon sparkled in the sunlight.
• His gemmy prose style was admired for its brilliance and precision.
• The gemmy surface of the mineral specimen reflected light in all directions.