Loose Gemstones for Custom Jewelry

Start With the Stone

When you are creating custom jewelry, the gemstone is where the piece begins. The color, shape, size, origin, and character of the stone all help guide the final design.

At Caleb B. Quashen, we offer natural loose gemstones selected for people who want something more personal than standard jewelry. Whether you are designing a custom engagement ring, pendant, anniversary gift, or heirloom piece, choosing the stone first gives your jeweler the ability to build the design around the gem itself.

Shop Loose Gemstones by Type

Ethically sourced natural diamonds — antique and geometric cuts with unique character — CBQ International.

All Loose Diamonds

Ethically sourced sapphire collection — Madagascar, Montana, Sri Lanka, Tanzania, Nigeria, Afghanistan, Kenya — Caleb B. Quashen International.

Loose Sapphires from All Origins

Unheated Tanzanite gemstone — teal, violet, and mermaid hues — ethically sourced from Merelani Hills.

Loose Tanzanite

All Loose Gemstones

Custom Rings

Find loose sapphires, diamonds, and rare gemstones that can become the center of a custom ring or engagement ring.

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3.80ct pear-cut Tanzanite gemstone resting on natural texture, displaying purple, green, and teal mermaid hues

Pendants & Necklaces

Explore colorful, unusual, and expressive gemstones that can be designed into custom pendants or statement necklaces.

Shop Pendant Stones

Meaningful Gifts

Choose a gemstone with personal meaning for an anniversary, birthday, milestone, or heirloom piece.

Find a Meaningful Stone

1.53 carat cushion cut sapphire gemstone with opalescent pink and purple hues, untreated and sourced from Sri Lanka.

One-of-a-Kind Jewelry

For designs that should not look like everyone else’s, start with a gemstone that has its own color, shape, and story.

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Why Buy the Gemstone First?

When you choose the loose gemstone first, your jeweler can design the setting around the exact stone. This gives you more control over the final piece, including the color, shape, size, and overall feeling of the jewelry.

Instead of fitting a stone into a standard design, the design can be created around the gemstone. For custom jewelry, this often leads to a piece that feels more intentional, personal, and connected to the person wearing it.

Shop Loose Gemstones

Loose 3.10 carat parti sapphire from the Central Queensland Gemfields shown face-up on a shell, displaying the Asscher cut step facets and natural green, yellow, and blue color zoning.

Selected for Color, Origin, and Character

Every gemstone in our collection is selected with care. We look for stones with individuality — unusual color, thoughtful cutting, natural beauty, and details that make the gem feel distinct.

Each listing includes clear specifications such as gemstone type, weight, shape and cut, dimensions, origin when known, and treatment information. Our goal is to help you choose a loose gemstone with confidence before your jeweler begins the design.

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How the Process Works

Choosing a loose gemstone does not have to be complicated. Start with the stone, ask questions if you need help, then work with your jeweler to design the final piece.

Choose Your Gemstone

Browse our collection and save the stones that stand out to you. Pay attention to color, shape, dimensions, and how the stone appears in photos and videos.

Ask Questions

If you are unsure which stone is right for your project, contact us with your design idea, budget, preferred colors, and the type of jewelry you want to make.

Design With Your Jeweler

Once you choose your gemstone, your jeweler can create the setting around the stone’s exact size, shape, and proportions.

Vibrant bubble gum pink sapphire weighing 2.28 carats, showcased on a dinosaur textured figurine, highlighting its flawless oval brilliant cut and rich color, from Luc Yen, Vietnam.

Personal guidance for your custom jewelry project

Need Help Choosing the Right Stone?

Tell us what you are creating, your preferred colors, budget, and whether the piece will be a ring, pendant, or another custom design. We can help point you toward loose gemstones that may work well for your project.

Contact Us for Help

Common Questions About Buying Loose Gemstones

Yes. Many custom jewelry projects begin with the center stone. Once you choose the gemstone, your jeweler can design the setting around its exact shape, size, and proportions.

Sapphires and diamonds are popular choices for custom rings because they are durable enough for regular wear. Other gemstones, such as tanzanite, may be better suited for pendants, earrings, or occasional-wear jewelry depending on the design.

We specialize in loose gemstones. This allows you and your jeweler to choose the stone first and create a custom piece around it.

Yes. If you are unsure which stone is right for your project, contact us with your design idea, budget, preferred colors, and the type of jewelry you want to make. We can help point you toward stones that may be a good fit.

Yes, our gemstones are natural unless clearly stated otherwise. We do not sell lab-grown gemstones. Treatment information is included in each product listing when available.

Yes. After purchasing a loose gemstone, you can take it to your jeweler to create the finished piece. We recommend sharing the gemstone’s dimensions with your jeweler before the design begins.

Start with the gemstone’s dimensions, shape, and intended use. Rings usually need stones that can handle regular wear, while pendants and earrings allow for more flexibility. If you are unsure, ask your jeweler or contact us before purchasing.

Ready to begin your custom piece?

Find the Stone Your Jewelry Will Be Built Around

Browse our collection of loose gemstones or contact us if you need help choosing the right stone for your custom jewelry project.