1. 红宝石
A ruby is a dark red jewel.

2. 红宝石色;红玉色;深红色
Something that is ruby is dark red in colour.

1. a deep and vivid red color

Synonym: crimsondeep red

2. a transparent piece of ruby that has been cut and polished and is valued as a precious gem

3. a transparent deep red variety of corundum
used as a gemstone and in lasers