Crafting Bloodstone Signet Rings: Stone, Story & the Lost Wax Process

Bloodstone signet rings sit at the intersection of ancient gemstone lore and hand-forged metalwork. At HerbertandWilks Jewellery I work with bloodstone cabochons set into sterling silver and gold signet rings — each shaped by hand in wax, cast using the lost wax process, and finished in my New Zealand studio. The result is what I'd call rustic fine jewellery: pieces with the weight and intention of fine metalwork, but with an organic, handmade character that no machine can replicate. All bloodstone signet rings are available made to order, and occasional Edition of One pieces are listed when a stone is too good not to make into something singular.

What Is Bloodstone?

Bloodstone — also called Heliotrope — is a dark green chalcedony gemstone marked with vivid red and orange spots caused by iron oxide inclusions. It rates 6.5–7 on the Mohs hardness scale, making it durable enough for everyday ring wear. It is the traditional birthstone for March and has been prized for thousands of years across Babylonian, Roman, and Indian cultures for its associations with vitality, courage, and grounding energy.

The stone is found in India, Australia, Brazil, South Africa, Germany, and the United States. The finest specimens have a deep forest-green base with bright, well-distributed red spots — the contrast is what makes bloodstone so striking set into a signet.

Bloodstone in History and Symbolism

The Babylonians called bloodstone 'The Stone of Babylon' and used it for seals and amulets — which makes it a historically apt choice for a signet ring. Roman soldiers carried bloodstone as a talisman of Mars, the god of war, believing it enhanced courage and stamina. Today it's worn as a grounding stone: one that connects the wearer to the present moment and to a sense of purpose.

For a signet ring — a form historically used to mark identity and authority — bloodstone brings exactly the right weight of meaning.

Designing the Bloodstone Signet Ring

For my first bloodstone signet I chose an oval cabochon and carved the ring form by hand in wax — working with saws, files, and knife blades to refine the shank and bezel. My approach is usually organic, and that shows in the finished piece. This is rustic fine jewellery in the truest sense: the surface carries the memory of the maker's hand, the texture of the cast metal, the slight irregularities that make each piece unmistakably one-of-a-kind.

For a stone setting I work with more precision than usual — the bezel needs to be true, the seat level, and the walls even so the stone sits cleanly once cast. This particular ring took two days of carving across the wax stage alone. That time is part of the process — each pass of the file is a decision about proportion and weight. The ring then went to casting, and the bloodstone was set once the metal was cleaned and refined.

The latest oval bloodstone signet — an Edition of One — is now listed and ready to wear.

The Lost Wax Casting Process

Lost wax casting is one of the oldest metalworking techniques in existence, and it's the process I use for my signet rings. Here's how it works:

1. Carve the Wax Model

The ring is carved entirely by hand in jeweller's wax. This is where proportion, comfort, and design are resolved — changes at this stage are easy; changes after casting are not.

2. Attach the Sprue

A wax sprue (a small channel) is attached to the model. This becomes the pathway for molten metal to enter the mould and for air to escape.

3. Build the Ceramic Shell

The wax model is dipped repeatedly into a silica slurry and coated with stucco until a ceramic shell roughly half an inch thick has built up around it.

4. Burn Out the Wax

The shell goes into a kiln. The wax melts and burns away — leaving a precise hollow negative of the original model. This is the 'lost wax' moment.

5. Pour the Metal

Molten silver or gold is poured (or vacuum-injected in commercial settings) into the shell. The metal fills every detail of the cavity.

6. Break Out and Clean

Once cooled, the ceramic shell is broken away — by hammer, sandblasting, or water. The sprue is cut, and any excess metal is recycled.

7. File, Set, and Finish

The ring is filed, refined, and polished. The bloodstone cabochon is then set by hand — pressed and burnished into the bezel until it sits flush and secure. The finish is intentionally organic: not high-polish perfection, but the kind of surface that rewards a closer look.

Caring for a Bloodstone Ring

Bloodstone is low maintenance. Clean with warm water, a mild detergent, and a soft brush. Avoid ultrasonic cleaners if your ring is set alongside softer stones. Store separately to prevent surface scratching. The stone can handle daily wear well — it's one of the reasons it has been used in rings and seals for millennia.

Made to Order — and Edition of One

All bloodstone signet rings at HerbertandWilks are available made to order in your size. If you're drawn to the rustic fine jewellery aesthetic — organic surfaces, hand-forged character, gemstones with history — and have a specific stone shape, metal, or design in mind, get in touch. I work with clients to develop custom commissions from the wax stage up.

Occasionally a stone arrives that demands to become something specific — those become Edition of One pieces, listed once and not repeated.

Browse the full Signet Rings collection — or explore the existing bloodstone rings below:

• Bloodstone Signet Ring
• Rectangle Bloodstone Signet Ring
• Oval Bloodstone Signet Ring — Edition of One

It's not about perfection — it's about the joy of learning and growing with each piece.

Sally x