Happy 21st Anniversary!
On this happy occasion the gem of note is Iolite.
This gem has a shade of color that is often compared to Tanzanite.
While looking at it's different sides many Iolite will change color from purple and blue to golden or clear. This is a gem that was used by Vikings to find the sun on a cloudy day. So remind your love how they are like the sun found on the cloudiest of days.