These are faceted titanium sapphires, an unusual variety of lab created sapphire grown for use in lasers with a padparascha-like orange-pink color (also called Ti:Sapphire or just Ti:Sapph). The stones are each labelled with their letter and weight and can be purchased individually. Stones G-L have light bubble inclusions and are discounted (we call these 'strawberry sapphires' since they have seeds.)
This is a very unusual variety of sapphire, colored solely by titanium. This is never found in nature or even in cheap flame fusion sapphire because it requires extreme chemical purity--even a hint of iron mixed in will result in a deep blue color. When it is made just right, however, the result is a bright, sort of padparascha-like pink color which shifts between a starburst pink and a more pink-orange depending on the lighting. We were able to get some leftover offcuts from a laser crystal grower--these were not produced for the gem trade but they make for incredible gems.