Square Ring in Sterling Silver with Peridot and Citrine Size: 7 3/4

Solid cast sterling silver square ring that is set with a center stone that is genuine peridot and the other stones are citrine. Size: 7 3/4 Face of the ring measures 3/4" square. Weight: 19 grams. Made in the USA and marked with an MH inside of a diamond and NTJ 925. If you know who this designer is, please let me know. This is so very well made. 

There are 4 rings from this same estate and you can see them pictured below.