Luxury & Hand-Crafted Designer Jewerly | The Vault Nantucket by Kather

The Vault Nantucket,
A Luxury Jewelry Boutique

Katherine Jetter is transforming the way we experience rare gems and couture jewelry. Step into Katherine's collection of hand picked rarities.

Stud Club

Elevate Your Ear Stack

Stay on Trend with our Latest Arrivals

Fabulous pieces for all your spring and summer festivities, from cocktail rings to statement earrings — be the best dressed guest!

KJ's Picks For Mother's Day

Small Floating Diamond Necklace

Wings of Love Medium Bracelet

Octavia Elizabeth

Diamond Parachute Nesting Gem Bracelet

Shop the Vault

Explore Katherine Jetter’s curated collection at our boutique jewelry store
for expressive color, exquisite craftsmanship, and timeless beauty.

Morrell Graduating Chain Necklace with Extra Elongated Oval Diamond Link

Stella Drop Earrings - Small

Pink Enamel Hamsa Ring

Hint, Hint

Open Hint, Hint Holiday Video

Oprah is Glowing in Katherine Jetter Hoops

Oprah's looking astonishing on the cover of her Oprah Quarterly Magazine, flaunting Katherine Jetter's Emerald and Pearl Hoop Earrings!

Shop Oprah's Look Now

Vault Nantucket in the Media

Enter KJ's Wardrobe

Learn Katherine Jetter's styling tips

Enter KJ's Wardrobe

Hoop, there it is!

Shop everyday staples, bold statement hoops and everything in between at our online luxury
jewelry store.

Diamond Three Sided Hoop Earrings

Aria U Huggie Hoops (Diamond)

Robinson Pelham

Midi Orb Hoop, Blue Sapphires

Large Diamond Triplet Hoop Earrings

Testimonials

★★★★★
“The Vault is my favorite store on Nantucket. It feels like I've entered a jewel box filled with beautiful and interesting pieces I don't see anywhere else. Katherine has curated the best from up-and-coming designers, as well as established ones, and she enjoys showing me all the exquisite jewelry as much as I enjoy trying it on! With her guidance and insight, Katherine has helped me find many unique pieces that I will wear and treasure forever.”
Susan Nelson
Vault Customer

★★★★★
“Whether it’s one of Katherine’s own designs or a designer from her curated selection, I’ve been in love with everything I’ve invested in with Katherine’s guidance. I always feel chic when I wear my Vault treasures and you can never feel too chic.”
Victoria McManus
Vault Customer

★★★★★
“Katherine and The Vault have many things in common, like their beauty, brilliance, quality, and uniqueness. I've had the pleasure of owning several of Katherine’s gems and I always enjoy shopping the beautiful designers and pieces. The Vault is the grown woman’s version of a Candy Store! You can always find something to love, whatever your taste and style may be.”
Penny Bradley
Vault Customer