This morning when I saw the video of HM at the Chelsea Flower Show wearing her Flame Lily brooch, I also saw the video below.

From circa 1.11 minutes there are some excellent views of this brooch, especially around 1.15 minutes.

What has caught my eye is the refraction of this stone. Because of that I very much doubt that it is a pale ruby or a pink sapphire. I am wondering if it is a pink Spinel? I know it is impossible to say with certainity, but perhaps we can have a little fun guessing.

What do others think?