precious stone 寶石

Precious Stones (by Christina Georgina Rossetti, 1830 – 1894)

An emerald is as green as grass,
A ruby red as blood,
A sapphire shines as blue as heaven,
But a flint lies in the mud.

A diamond is a brilliant stone
To catch the world's desire,
An opal holds a rainbow light,
But a flint holds fire.