Preserving flowers..

Mj

I have one rose from every bouquet my husband has ever bought me... from the first day he showed up at my house through our wedding day etc. I want to preserve each rose forever. They each have dates attached to them and a story of some sort. I was thinking of a time I visited a high end spa with my sister for my bachelorette and in the decor of the building were solid slabs or blocks of what appeared to be glass... with flowers and leaves in beautiful design inside of them. Is it possible to preserve flowers in glass somehow like that? Maybe it was a type of solid gel of some kind poured? Any ideas would be greatly appreciated!! I want a way to preserve them so they can’t be damaged in any way and will last virtually forever. Please help!! Thanks!