Dendritic inclusion with 'cotton wool' type inclusions in beryllium-treated sapphire.

 

 

Wheat-like feather inclusion in beryllium-treated sapphire.

 

 

Liquid tubular channel inclusions in beryllium-treated sapphire.

 

 

'Cotton wool' type inclusions in beryllium-treated sapphire.

 

 

 

A cross-sectioned slice through a beryllium-treated sapphire.

 The orange colour rim is clearly visible around the pink core.