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My Jewelry Guy

Marquise Lab-Grown Diamond Necklace

Marquise Lab-Grown Diamond Necklace

Regular price $999.00 USD
Regular price Sale price $999.00 USD
Sale Sold out
Shipping calculated at checkout.

Solid 14K gold • 1/4 CT lab-grown marquise diamond • Adjustable 16–18 inches • Made to order

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1/4 CT lab-grown marquise diamond Solid 14K gold Adjustable 16–18 inches Made to order
Marquise lab-grown diamond necklace shown at its natural scale

Quietly Distinctive

A marquise made for every day.

Set east-west along a delicate cable chain, the elongated diamond creates a refined point of light without feeling formal or overstated.

1/4 CTLab-grown diamond
6 × 3 mmApproximate diamond size
16–18 inAdjustable length

Chosen With Intention

Beautiful sparkle without paying for differences that disappear.

My Jewelry Guy Take

G–H–I color and SI clarity are a thoughtful match for a marquise diamond at this scale: bright, lively, and honestly priced. I would rather recommend an attractive diamond in a well-made solid-gold necklace than add cost for paper grades that most customers would not see while wearing it.

Designed to Sit Beautifully

Easy to wear alone. Easy to layer.

The 1 mm cable chain adjusts between 16 and 18 inches, giving you room to place the diamond where it works best with your neckline or other jewelry.

Secure Setting

Protective V-prongs

Two prongs protect the pointed ends while leaving the marquise outline easy to see.

Thoughtful Fit

Two wearing lengths

Use the 16-inch position for a closer fit or the 18-inch position for a little more drop.

Everyday Finish

Polished solid 14K gold

Choose white, yellow, or rose gold without changing the diamond specifications.

Choose Your Gold

Three colors. The same refined design.

14K White Gold

A cool, seamless look that keeps attention on the diamond.

14K Yellow Gold

Classic warmth with a soft contrast around the bright marquise.

14K Rose Gold

A subtle blush tone that gives the minimalist design a warmer character.

Complete the Marquise Collection

Designed to feel connected, never overly matched.

The coordinating earrings and bracelet repeat the same east-west marquise shape in pieces that work just as naturally on their own.

Made for You

Thoughtful production, not artificial urgency.

Each necklace is made to order in your chosen gold color. Please allow approximately 3–5 weeks for production before shipping. If timing matters for an anniversary, birthday, or another meaningful date, contact me before ordering.

Contact Matt

Good to Know

Before you choose.

What does 1/4 CT mean?

The necklace contains one lab-grown marquise diamond with a total weight of approximately 1/4 carat.

Can I adjust the necklace length?

Yes. The cable chain includes wearing positions at approximately 16 and 18 inches.

Do the three gold colors use the same diamond specifications?

Yes. White, yellow, and rose gold use the same 1/4 CT lab-grown marquise diamond specification: approximately 6 × 3 mm, G–H–I color, and SI clarity.

How long will my necklace take?

Please allow approximately 3–5 weeks for made-to-order production before shipping.