OPENING SOON · EXPLORE THE COLLECTION · JOIN THE EARLY-ACCESS LIST

UNTREATED CORUNDUM

Nature made it.
We reveal it.

Natural sapphire and ruby, precision cut by hand. No heat. No treatment. No compromise.

01Each stone cut individually
by The House of Corundum

JEWELRY / COMING SOON

The setting stays quiet.
The stone speaks.

Simple silver and gold rings, earrings and necklaces built around individually cut natural sapphire and ruby. These concept images preview the direction; each finished piece will be photographed and listed on its own.

Concept image of a simple yellow gold solitaire ring with a deep-blue sapphireCOMING SOON

14k yellow gold

Midnight sapphire solitaire

Concept image · final piece may vary
Concept image of simple sterling silver earrings with blue-teal sapphiresCOMING SOON

Sterling silver

Blue-teal sapphire studs

Concept image · final piece may vary
Concept image of simple yellow gold drop earrings with midnight-blue sapphiresCOMING SOON

14k yellow gold

Midnight sapphire drops

Concept image · final piece may vary
Concept image of a sterling silver necklace with a yellow and teal-blue cushion-cut sapphireCOMING SOON

Sterling silver

Golden tide sapphire necklace

Concept image · final piece may vary
ONE OF ONE

Jewelry will be released individually as settings are completed. No mass-produced inventory, and no decorative halo competing with the gem.

FIRST RELEASE / 13

Cut stones

Every stone is one of one. Sold stones remain visible as part of the archive, but can no longer be purchased.

THE FIRST RELEASE

Opening soon.

Sales are not active yet. The first release is being prepared now, beginning with Selene, Vaelora, Nerith and Vespera.

THE HOUSE OF CORUNDUM STANDARD / 01

Corundum without compromise.

Heat can improve color. Treatment can conceal nature. We choose neither. Every stone from The House of Corundum begins as natural rough and is cut to reveal the character already within it—not manufacture a different one.

WHY NATURAL? / 02

Made by the earth.
Irreplaceable by design.

Synthetic sapphire and ruby can be beautiful, durable and share the same basic chemistry and crystal structure as natural corundum. But they can be produced again. A natural gemstone cannot.

Every natural sapphire and ruby is the result of geological events that unfolded millions—and in some deposits, billions—of years ago. Its color zoning, inclusions and subtle irregularities form a record of that origin. They are not manufacturing defects; they are part of what makes the stone individual.

We choose natural, untreated corundum because its rarity is genuine. No laboratory growth, no heat-driven color improvement and no treatment intended to disguise its original character. Faceting reveals the color, structure and light already inside.

NATURAL CORUNDUMMillions to billions
of years

Formed through ancient geological processes. The exact age depends on its origin.

LABORATORY-GROWNA human production
timescale

Made under controlled conditions and capable of being produced again.

“A synthetic stone can be recreated. A natural untreated stone can only be discovered.”

ROUGH TO CUT / 01

Meet the stone
before it becomes a gem.

Select a one-of-one piece of natural rough, study it in photographs and video, then choose the direction of its cut. You are not simply choosing a finished shape—you are taking part in the decisions that reveal it.

Follow one stone from its natural beginning to its finished form, and receive a gem whose story you helped shape.
01

Choose the rough

Review its color, dimensions, weight, visible inclusions and cutting considerations.

02

Choose the direction

Select from the cuts suited to that individual stone, or request a custom conversation.

03

Know your gem

Optional process photographs or timelapse preserve its journey from rough crystal to finished gemstone.

9 rough stones found · sold pieces remain in the archive

01COMING SOON
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Natural Kashmir purple sapphire rough · The House of Corundum KP01

Nyxara — Violet Expanse

Rough weight
7.08 ct
Dimensions (est.)
12.7 × 10.6 × 4.2 mm
Observed color
Purple to violet-purple
Possible outcome
Final dimensions and weight are determined after orientation and design review
Cutter’s note

Its broad, flatter profile favors a low-profile artisan fantasy design built around the natural outline. That approach can preserve more weight and visible character than forcing the stone into a deep standardized shape, subject to what becomes visible during cutting.

02COMING SOON
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Natural Kashmir purple sapphire rough · The House of Corundum KP02

Elaria — Violet Flame

Rough weight
5.71 ct
Dimensions (est.)
9.2 × 6.9 × 4.8 mm
Observed color
Rich purple to violet-purple
Possible outcome
Final dimensions and weight are determined after orientation and design review
Cutter’s note

Its compact outline and useful 4.8 mm depth offer several design paths. An artisan cushion, oval or asymmetrical fantasy cut could follow the natural form and retain more character and weight than forcing an exact calibrated shape. Final orientation will depend on color direction, silk and internal features visible during cutting.

03COMING SOON
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Natural Kashmir purple sapphire rough · The House of Corundum KP03

Thalara — Violet Spire

Rough weight
3.05 ct
Dimensions (est.)
9.0 × 8.6 × 6.8 mm
Observed color
Purple to soft violet-purple
Possible outcome
Final dimensions and weight are determined after orientation and design review
Cutter’s note

This deeper, irregular crystal offers more vertical material than the first two pieces. Its natural taper could suit a compact pear, oval, cushion or freeform fantasy design. A final plan should follow the strongest color direction and work around the visible surface texture and any internal features revealed during preforming.

04COMING SOON
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Natural multicolored sapphire rough · The House of Corundum MC01

Caelora — Prism Tide

Rough weight
2.28 ct
Dimensions (est.)
11.2 × 5.8 × 2.45 mm
Observed color
Blue and teal flowing into green with flashes of yellow
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

This long, low-profile crystal carries a shifting palette of blue, teal and green with yellow accents. Its 2.45 mm depth favors a weight-conscious artisan design that follows the natural outline—such as a freeform shield, kite or elongated fantasy cut—while deliberately placing the color zones across the finished face. Forcing a deep calibrated shape would likely sacrifice more material and may diminish the stone’s multicolored character.

05COMING SOON
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Natural multicolored sapphire rough · The House of Corundum MC02

Auralis — Hidden Current

Rough weight
1.87 ct
Dimensions (est.)
9.2 × 5.9 × 3.0 mm
Observed color
Deep blue and teal crossed by green and yellow zoning
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

A dark blue-teal body is crossed by a softer green-to-yellow current that shifts with orientation. Its elongated outline and 3.0 mm depth allow more flexibility than the flatter companion piece. A weight-conscious shield, kite, oval or asymmetrical fantasy design could preserve the natural silhouette while placing the lighter color band where it remains visible across the finished face.

06COMING SOON
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Natural multicolored sapphire rough · The House of Corundum MC03

Nymarion — Verdant Eclipse

Rough weight
2.12 ct
Dimensions (est.)
8.1 × 4.6 × 4.3 mm
Observed color
Deep blue and teal shifting through forest green with muted yellow undertones
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

This compact crystal has unusually generous 4.3 mm depth for its 8.1 × 4.6 mm outline. Its dark blue-teal body transitions through forest green with subdued yellow undertones. A carefully oriented oval, cushion, shield or freeform fantasy cut could use that depth to build light return while preserving the layered multicolor character. Final design should follow the strongest color direction revealed during preforming.

07COMING SOON
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Natural yellow sapphire rough · The House of Corundum YS01

Solyra — Golden Wake

Rough weight
2.00 ct
Dimensions (est.)
9.2 × 5.8 × 4.5 mm
Observed color
Predominantly yellow with champagne, olive and soft golden undertones
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

This elongated crystal is predominantly yellow, with champagne, olive and soft golden undertones that shift between its natural faces. Its useful 4.5 mm depth offers room for a bright oval, pear, cushion or character-led fantasy design. Careful orientation can keep the warmest yellow visible through the face while working around the irregular outer surface and preserving as much weight as the final design allows.

08COMING SOON
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Natural blue sapphire rough · The House of Corundum PB01

Marethis — Peacock Current

Rough weight
1.69 ct
Dimensions (est.)
7.8 × 5.6 × 3.9 mm
Observed color
Predominantly blue with blue-teal zoning and possible peacock-blue character
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

This compact sapphire appears predominantly blue in the rough, with blue-teal color visible through portions of the crystal. Its useful 3.9 mm depth gives room for a weight-conscious cushion, oval, shield or character-led fantasy design. Careful orientation may bring forward a peacock-blue appearance in the finished stone, although the exact color, brightness and zoning cannot be guaranteed until the rough is opened and cut.

09COMING SOON
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Natural teal-blue sapphire rough · The House of Corundum TB01

Neravia — Teal Depth

Rough weight
2.19 ct
Dimensions (est.)
7.8 × 5.5 × 4.4 mm
Observed color
Teal-blue dominant with deep blue and green-teal character
Possible outcome
Final dimensions, color placement and weight are determined after orientation and design review
Cutter’s note

This compact sapphire is teal-blue dominant, with deeper blue and green-teal character visible through different natural faces. Its balanced 7.8 × 5.5 mm outline and useful 4.4 mm depth provide several weight-conscious options, including an oval, cushion, shield or freeform fantasy design. Final orientation should favor the strongest teal-blue face while preserving depth for light return and working around the irregular outer surface.

Important rough-stone disclosure. All rough-stone dimensions are best estimates. Faceting commonly removes 50–75% of a rough stone’s original weight, and finished weight, dimensions, color and appearance cannot be guaranteed. Inclusions, fractures, stress or zoning may become visible during cutting. Artisan hand cutting generally prioritizes weight retention and the stone’s individual character; calibrated sizes or specified designs may require additional material loss. For a particular color, calibrated measurement or custom design, contact The House of Corundum before ordering.

HONEST PHOTOGRAPHY / 04

What you see should be
what you receive.

Gemstones rarely look exactly the same under every light. Our photographs and videos are made to represent each stone honestly—not to create an idealized version of it.

Images may be cropped and adjusted for accurate exposure and white balance, but color, clarity, inclusions and surface condition are not digitally enhanced or concealed. Whenever possible, stones are shown in multiple lighting conditions and in motion, giving you a more complete view before purchasing.

The goal is simple: the gemstone you receive should meet—or exceed—the expectations created by its photographs.

THE CUTTING ROOM / 05

Cut by hand.

Each stone is oriented, preformed, faceted and polished in-house. The process is documented through close-up photography and/or timelapse—so the journey from rough to finished gem remains part of the stone.

Discuss a custom cut

SERVICES / 04

01

Available stones

Natural untreated sapphire and ruby, offered individually or as calibrated pairs and suites.

02

Custom cutting

Cutting for select rough, with design chosen around color, orientation and weight retention.

03

Your rough, cut by hand

Cutting rough supplied by the customer. Each piece is evaluated first for material, inclusions, orientation, expected yield and cutting risk.

04

Trade inquiries

Loose stones, calibrated sizes and sourcing conversations for jewelers and designers.

OPENING SOON

Find the stone
worth keeping.

Explore the stones now and join the list for first-release notices. Individual listings also offer their own availability notifications.

Contact us about a custom cut