Vintage handmade ring with blue polished stone, adjustable size

Heirloom handmade ring with blue polished stone My grandfather made jewelry from semi-precious stones. I wish I knew what stone it is. All jewelry listed is from my moms jewelry box. She was born in 1940 and had lots of jewelry from her mom. They span decades of fashion. She was a kindergarten teacher, had an adventurous spirit, loved to travel and shop and buy from locals, grew up and lived most of her life in California. Her father loved to make ornamental heirloom jewelry set with hand cut, polished semi-precious and ornamental stones. Those are one of a kind pieces made in the 60’s & 70’s in Southern California. Bundle with other things and save! Make an offer so I can share her sense of style and fashion with others!