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Astra Jewelers
+1-973-289-9290

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Fine Jewelry | Upper Montclair, NJ

Your
private jewelry studio
in Upper Montclair.

  • A private studio, by appointmentWalk-ins are welcome too, Monday through Saturday.
  • Natural and lab grown diamondsShown together in daylight, so you can compare.
  • Custom design and gemstone sourcingSee it in 3D, then wear a printed model first.
  • Gold, platinum and repair14k to 18k, white to rose, resizing and replating.
  • Engagement rings and wedding bandsWhere most first visits start.
Verified industry membership Proud member of Jewelers of America with JBT industry credentials.
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Natural Diamonds Fine Jewelry Lab-Grown Diamonds Custom Design Engagement Rings Upper Montclair, NJ Gemstone Sourcing Jewelry Repair Private Appointments Fine Jewelry Lab-Grown Diamonds Custom Design Engagement Rings Upper Montclair, NJ Gemstone Sourcing Jewelry Repair Private Appointments
Astra Jewelers founders Eddie and Stephanie Dieguez
A note from the founders

Just the two of us, and you

Astra Jewelers is the two of us, Eddie and Stephanie, a husband and wife team. When you visit, you talk to one of us directly. Never a rotation of sales staff, never a stranger picking up where someone else left off. We keep the studio private and appointment based because choosing jewelry is personal. Personal things deserve quiet.

Every piece in our cases was picked by one of us. And when we make something custom, it is drawn around you, your hand, your stone, your story, so the finished piece could never have belonged to anyone else.

Eddie & Stephanie Dieguez Founders, Astra Jewelers
From the studio

See the work moving

Short clips of recent pieces and visits. The one in the middle plays on its own and moves along when it finishes. Sound stays off unless you turn it on.

Radiant, cushion and elongated cushion diamonds held together
A client favorite ring from this season
A 7.4 carat princess cut center stone
A piece moving from loose stone to finished ring in the studio
A pear cut ruby ring with diamond accents, worn on the hand
A Briston Clubmaster chronograph on a red, white and blue strap
A painting on display at the Astra Jewelers studio
Google Reviews

What Clients Say

G
Astra Jewelers View on Google

Google Reviews

Real customer feedback, see what people say about Astra Jewelers.

Eddie and Stephanie are the best jewelers I’ve ever worked with! They are incredibly kind, patient, and truly take the time to sit down with you, listen to your vision, and understand exactly what you’re hoping to create. You can tell they genuinely care about making pieces that you’ll love and feel confident wearing. They are always open to conversation and revisions throughout the process, and they never once made me feel silly for asking questions, changing or refining my vision, or overthinking any detail. They’re also incredibly transparent throughout the process and keep you updated along the way, which made me feel informed and comfortable from start to finish. They made me feel completely comfortable throughout the entire process. Their work is beautiful and done with so much integrity, and I always felt valued as a customer. Their process truly feels customized to each person. There are no shortcuts or band-aid fixes—they take the time to make sure everything is done the right way. It was such a pleasure working with them on our rings and a pair of earrings for my mom. Every piece came out beautifully, and I’m so grateful for the care they put into everything. I look forward to continuing to work with them for years to come!
A yellow gold emerald cut solitaire and a plain band worn on two hands An emerald cut diamond solitaire in yellow gold with a fitted band beneath it A pair of emerald cut diamond stud earrings on cream velvet
Isabella Badagliacca
Astra Jewelers is truly a gem! Stephanie and Eddie are incredible: so professional, knowledgeable, and genuinely warm. They make you feel like family from the moment you walk in. They’ve created several custom pieces for me, and their sourcing is fabulous. They have such an amazing eye for design. Everything feels elegant, elevated, and timeless. The 3D renderings are incredibly helpful because you can really visualize the pieces and fine-tune every detail before they’re made. Throughout the entire process, Stephanie and Eddie keep you updated every step of the way, which makes the experience feel easy, exciting, and completely personal. The craftsmanship and attention to detail are exceptional. I’m completely obsessed with every piece! Everything they’ve made for me has exceeded my expectations. Astra has absolutely become my go-to jeweler, and I recommend Stephanie and Eddie wholeheartedly to anyone looking for something truly special.
Ruki Oygar
Stephanie and Eddie are amazing - I will be working with Astra Jewelers for all of my jewelry from now on! When my boyfriend and I walked in for our appointment to discuss a custom engagement ring on June 13, a kind group of customers were leaving the studio and told us how much they enjoyed their experience with Astra and we’ll be happy here. And they were 100% right. During that first appointment, Stephanie and Eddie thoughtfully listened to what I wanted for my custom ring and offered ideas when I was not able to verbalize what I envisioned. They were so welcoming, easy to talk to, and made us feel like this very important chapter in my boyfriend’s and my lives are in the best hands. Following our appointment, Stephanie kept me updated via text about the artist doing the renderings, clarified my visions even more, and helped communicate my unique, non-traditional dream “nature-inspired” engagement ring to the artist. She was responsive and helpful with my disorganized thoughts over text, and within weeks we had the most beautiful, creative, uniquely-mine ring ready for pickup. Our experience with Astra Jewelers was incredibly pleasant, calming, and stressless. Stephanie and Eddie are the best people to collaborate with, the best people to get the job done, and just overall a wonderful couple. We cannot recommend Astra Jewelers enough!
Elise Molleur
It was lovely to work with Stephanie and Eddie for a custom necklace. They are extremely knowledgeable and use high quality materials. I highly recommend Astra Jewelers!
Sarah Toosarvandani
We purchased our wedding bands and engagement ring from Astra Jewelers. From beginning to end the process was not only smooth and efficient but fun. They never made us feel like we were asking too many questions and they guided us through the entire process. The rings turned out even better than we had imagined due to their input. They are skilled and knowledgeable about diamonds and fine jewelry. Their inputs were really helpful when designing the ring. They are able to provide not only 3d renderings of the designs but also 3d prints so that you can wear the rings and see them before they are created. They treat their customers like family. Amazing people, beautiful jewelry - highly recommend!!!
Shafaq Tanweer
Very happy with the service I received. Custom design, stone comparisons, 3D models, wax models. I ended up with exactly what I wanted. Eddie and Stephanie did a great job.
Chris Harrison
This is the perfect spot for high quality jewelry and beautifully crafted custom pieces. The customer service is truly top-notch. They take the time to understand your vision and expertly bring custom designs to life with exceptional craftsmanship. I absolutely love my new custom ring!
Clara
Excellent professional service - very nice people and extremely knowledgeable about their craft. Highly recommend!
Leonard Catanzaro

Read all our reviews on Google, rated 5.0

Upper Montclair Studio

Find Astra

We are based in Upper Montclair and serve clients across Essex County and surrounding New Jersey areas through private appointments and in-store visits.

Address 250 Bellevue Ave, 2nd Floor, Montclair, NJ 07043
Hours Mon-Sat: 10:00am-6:00pm