The Kalo Shop stick pin with cabochon stone face

The Kalo Shop
stick pin with a bezel set cabochon stone
Chicago, Illinois, circa 1908
14K yellow gold, chrysocolla, azurite & malachite
stamped marks
2.6 dwts; engraved wedding inscription to reverse "I do / 1908"
face: 9/16"w x 3/4"h; 2 5/8"l

Provenance:
The Paul & Terry Somerson Collection of 20th and 21st Century Metalwork and Jewelry

Literature:
Berberian, Rosalie, Creating Beauty: Jewelry and Enamels of the American Arts & Crafts Movement, Schiffer, 2019, p. 16
Condition Report: No apparent issues. Natural inclusions to the stone. Stamped: Kalo / 14K.