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A gold ring with an oval diamond on a reflective surface emits colorful light patterns, suggesting elegance and luxury against a dark blue background.

Engagement Rings

Earrings

Wedding Bands

Bracelets

RINGS BY STYLE

Three Stone

Solitaire

Side Stone

Floral Inspired

Hidden Halo

Three Stone

Solitaire

Side Stone

Floral Inspired

Hidden Halo

EXPLORE SHAPES

Discover our extraordinary collection of diamonds categorized by shape. Find your ideal cut, from round to oval, to suit your style.

Round

A classic and timeless cut that maximizes brilliance and fire.

Cushion

A soft square with rounded corners, the Cushion cut blends the classic charm of an old mine cut with the fire and brilliance of a modern round cut.

Princess

A square brilliant cut that offers excellent fire and brilliance with a modern, geometric appeal.

Emerald

A rectangular step cut with cropped corners that emphasizes clarity and elegance.

Oval

An elongated round brilliant cut that creates the illusion of greater size and flatters the finger.

Marquise

A boat-shaped cut with pointed ends that creates the illusion of greater size and length.

Pear

A teardrop-shaped cut that combines the brilliance of a round cut with the elegance of a marquise.

Heart

A romantic cut shaped like a heart that requires exceptional skill to create perfect symmetry.

Radiant

A rectangular cut with brilliant facets that combines the elegance of an emerald cut with the sparkle of a round brilliant.

Asscher

A square step cut with cropped corners that offers a vintage, art deco appeal.

Round Cushion Princess Emerald Oval Marquise Pear Heart Radiant Asscher

A classic and timeless cut that maximizes brilliance and fire.

A soft square with rounded corners, the Cushion cut blends the classic charm of an old mine cut with the fire and brilliance of a modern round cut.

A square brilliant cut that offers excellent fire and brilliance with a modern, geometric appeal.

A rectangular step cut with cropped corners that emphasizes clarity and elegance.

An elongated round brilliant cut that creates the illusion of greater size and flatters the finger.

A boat-shaped cut with pointed ends that creates the illusion of greater size and length.

A teardrop-shaped cut that combines the brilliance of a round cut with the elegance of a marquise.

A romantic cut shaped like a heart that requires exceptional skill to create perfect symmetry.

A rectangular cut with brilliant facets that combines the elegance of an emerald cut with the sparkle of a round brilliant.

A square step cut with cropped corners that offers a vintage, art deco appeal.

Specialty Cuts

Vintage ring with an emerald-cut diamond set in ornate gold band, featuring intricate floral engravings, exuding elegance and classic charm.

Hexagon

Moval

portuguese

Dutch Marquise

SHOP ALL

Three gold diamond rings rest on a dark blue background, elegantly illuminated. The rings feature emerald, oval, and round brilliant-cut diamonds.

DIAMOND
EDUCATION

Learn about the “4 C’s” to help you with your online diamond shopping.

diamond cut diamond cLARITY diamond color carat weight

Hand wearing a gold ring with a diamond on a beige background

OUR VISION

We believe beauty should never come at the cost of integrity. We’re committed to helping you celebrate life’s most meaningful moments with jewelry that reflects both love and conscience.

discover our story

STIENHARDT

for

$ 50 OFF your first
order

*Minimum spend of $500. $50 off code will be emailed to you.

Woman wearing a diamond ring on her hand with a blue top against a beige background

Our
Certifications

Stienhardt diamonds are graded by the three most reputable laboratories in the industry, IGI, GIA, and GCAL.

STIENHARDT

CONTACT US

STIENHARDT

36 W 44th St Suite 10018 New York, NY 10036

FAQ's

Yes. Lab-created diamonds are real diamonds with the same chemical, physical, and optical properties as mined diamonds.
👉Learn more about lab-grown diamonds

Yes. All Stienhardt diamonds are independently certified by leading gemological laboratories such as IGI or GIA to verify quality and authenticity.

👉 Learn more about diamond certification

Stienhardt diamonds are created using advanced laboratory technology that replicates the natural diamond formation process in a controlled environment.

Lab-created diamonds offer the same brilliance, durability, and longevity as mined diamonds while providing a more transparent and responsible alternative.

Lab-created diamonds generally have a lower environmental and social impact because they avoid traditional mining and large-scale land disruption.

Yes. Lab-created diamonds are as durable as mined diamonds and ideal for daily wear.

Yes. Diamonds created in a lab are just as durable as mined diamonds and are suitable for everyday wear.

Stienhardt offers a curated selection of fine jewelry, including rings, earrings, bands, and statement pieces designed with precision craftsmanship.

Yes. Customers can personalize designs by selecting materials, settings, and stones to create a piece that reflects their individual style.

Yes. Stienhardt offers individually selected stones for customers seeking flexibility in future designs or custom settings.

Clean diamond jewelry using warm water, mild soap, and a soft brush. Store pieces separately and avoid harsh chemicals to maintain brilliance.

We offer a 30-day return policy. Items may be returned or exchanged within 15 days of delivery, provided they are in new, unworn condition with the original receipt.

Production and delivery timelines vary by design and customization. Estimated timelines are shown on each product page.

You can reach our customer care team at care@stienhardt.com or call 917-909-6402. Our representatives are happy to assist with any questions.