Flint - Christina Rossetti - (1830 - 1894)

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

A diamond is a brilliant stone, 
To catch the world's desire; 
An opal holds a fiery spark; 
But a flint holds fire."  

Christina Georgina Rossetti