Let's Make Magic

The Vault’s curated collection of loose gemstones are ready to be transformed into your one-of-a-kind custom piece.


A Journey of Self-Expression

Inside The Vault Nantucket, and online in the comfort of home, the discerning and the curious take a singular journey. Led by her exceptional eye, Katherine Jetter handpicks the world’s most captivating rare gems and collaborates closely with couture clients to bring their dreams to life.

Design your dream piece.

Bring your vision to life with master designer-gemologist, Katherine Jetter.

First things first: Yes, we do custom engagement rings. We love to! Here’s how our custom design process works: To begin, bring us your vision, and Katherine will source gemstones and diamonds especially for you, presenting you with about five handpicked stones via pictures or Zoom. Then, if you love what you see, Katherine will begin to present you with design renderings and estimates. Call, email, or text us to start the process, or fill out the form below.

Tell us a bit about you and your vision, and we’ll get back to you tout de suite!

Fill out the form below, or contact directly at (508) 825-6174 or info@katherinejetter.com

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