The heart behind JTI Diamond Co.

Meet Mariah Andell

Growing up behind the counter of her parents' jewelry store in Texas, Mariah Andell was immersed in the world of diamonds, gemstones, and the art of jewelry making from the very beginning. Spending her childhood surrounded by the warmth of client relationships and the sparkle of fine jewelry, she developed a love for storytelling and design that shaped her path as a second-generation jeweler. Now based in San Antonio, Mariah honors her roots while carving her own legacy in the jewelry industry.

A GIA graduate in diamonds and colored stones, Mariah combines technical expertise with a creative touch to craft one-of-a-kind designs. Her passion for jewelry design blossomed from watching the artisans in her parents’ workshop bring creations to life—carving wax, setting stones, and crafting pieces by hand. Designing her first ring at just 10 years old was only the beginning. Today, she continues to embrace the art of sourcing rare gemstones and transforming them into designs that hold deep personal meaning for her clients.

As a proud Texas native, Mariah draws inspiration from the vibrant spirit of her home state—from the laid-back elegance of Texas style to the warmth of year-round sunshine. Whether it’s the timeless allure of cowboy boots paired with modern sophistication or the welcoming charm of her Texas roots, Mariah channels these influences into jewelry that feels both authentic and deeply personal. These elements guide her philosophy: to craft jewelry that embodies timeless elegance and heartfelt connection.

Mariah’s relationships with her clients are built on trust and genuine connection. "In this business, your reputation matters even more than your expertise," Mariah shares. Over the years, she has formed lasting bonds with clients from all walks of life, turning professional relationships into friendships that extend far beyond jewelry.

Beyond Texas, Mariah draws inspiration from fashion, art, music, and architecture, as well as her travels to places like Tuscany and Capri, where the ocean and vineyards left lasting impressions. She also treasures the gems she’s collected over the years—stones brought back from her father’s travels to Africa and Australia, as well as pieces she sourced from industry friends in Brazil. These treasures reflect her lifelong passion for the art of jewelry. Motherhood has further deepened her perspective, teaching her to appreciate the beauty in life’s smallest moments and translating that emotion into every piece she designs.

For Mariah, creating jewelry is about more than just crafting beautiful pieces; it’s about celebrating her clients’ unique journeys and turning their stories into timeless works of art.

Q&A with Mariah

Growing up in my parents' jewelry store, I was surrounded by the beauty of gemstones and the joy of helping clients celebrate their milestones. I loved watching the jewelers at work—carving wax, casting gold, and setting stones by hand. Designing my first ring at just 10 years old solidified my passion. Over the years, I’ve fallen in love with sourcing gemstones and creating designs that transform those stones into something truly meaningful.

Motherhood has taught me to find beauty in life’s smallest moments. Seeing the world through my child’s eyes has deepened my understanding of love, legacy, and attention to detail, which I now incorporate into my designs. It’s a constant source of inspiration, and it reminds me that the smallest details can hold the most meaning.

I take a collaborative approach, connecting deeply with my clients to understand their vision and story. From sketches to sourcing stones and refining designs, I ensure every detail reflects their style and meaning. One of my favorite projects was an opal and diamond bolo necklace, where I had complete creative freedom—it was magical to see it come to life.

I find inspiration everywhere—the ocean, art, architecture, and even a well-designed building. Travels to places like Tuscany and Capri, as well as Texas’ effortless charm, shape my style. At the core of it all, though, are my clients’ unique stories, which drive me to create something truly personal

The best part is seeing the joy on a client’s face when they see their finished piece. Knowing I’ve helped create something meaningful for their special moments—whether it’s an engagement or an heirloom redesign—is incredibly fulfilling.

Mariah’s Design Philosophy

At the heart of Mariah’s work is her belief that every piece of jewelry should tell a story. She approaches each design with precision, care, and a commitment to honoring her clients’ unique journeys. Whether crafting a bespoke engagement ring, transforming a cherished heirloom, or creating one-of-a-kind gifts, Mariah’s artistry lies in blending timeless elegance with personal meaning.

Ready to bring your vision to life?

Collaborate with Mariah to design a piece that tells your story.

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