Engagement rings / Rings

Penumbra Ring

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We offer complimentary shipping on all orders over $200 within the United States.

Line cluster ring with unheated Umba sapphires

This one-of-a-kind piece was inspired by and designed to showcase the unique beauty of its materials. Because of the scarcity of these stones, we only made one. 

CM Signature

Please allow two to three weeks for delivery.
For questions, please contact online@mociun.com

Penumbra Ring front view
Penumbra Ring left view
Penumbra Ring right view
Penumbra Ring

Item Details


Four step cut, unheated purple, Umba sapphires weight 1.07 ct., 0.60 ct., 1.13 ct. and 0.61 ct.

Stones are secured in bezel setting

Square wire shank measures 1.7mm

Set in 18k yellow gold

We proudly design all of our jewelry in Williamsburg, Brooklyn. Each piece is made to order in New York City.