I have four gems.....

[Mrs.Goodchild]

Onyx for a boy would be very cool imo xxx

 

[Rooster30]

No idea now haha! Probably my baby brains fault. They may not be gems after all as can't find them now!

 

[giuliaplus2]

I've just googled "mariam gemstone" and it really seems to be one it's also (more or less) known as the calligrapher's stone. Couldn't find Amalia, though

 

[Gingerjv]

Olivine is a gem / what do you all think of that name? Xx

Olivine is sounds very nice to me!