About Diamond Reserve Co.

Welcome to Diamond Reserve Co. – your exclusive gateway to extraordinary diamonds, exceptional craftsmanship, and personalized service you won’t find anywhere else. Founded by Joshua Mancilla, Diamond Reserve Co. combines insider knowledge, unmatched wholesale access, and deep diamond data expertise, ensuring every gem we offer is a cut above the rest.

Meet Joshua Mancilla – Diamond Industry Leader

Joshua Mancilla is more than just a diamond dealer—he’s a seasoned industry executive with extensive experience at the highest levels of diamond manufacturing and wholesale. Having led sales teams for major diamond manufacturers and wholesalers, Joshua has established strong, direct relationships with global suppliers, giving Diamond Reserve Co. exclusive access to diamonds many other jewelers simply can’t obtain.

Joshua currently serves as the Head of Sales for Uni Diamonds, an innovative global leader in diamond data analytics. His position gives him exceptional insight into diamond pricing, availability, market trends, and quality analytics, enabling Diamond Reserve Co. to offer unparalleled transparency and value.

Exclusive Access and Deep Industry Connections

Joshua’s expertise and longstanding wholesale relationships grant Diamond Reserve Co. direct access to exceptional, rare diamonds often unseen by traditional jewelry stores. Leveraging these exclusive industry connections, we handpick the most beautiful and sought-after diamonds from around the world, ensuring each piece we offer is truly exceptional.

Mastery in Diamond Data & Pricing

In addition to his hands-on wholesale experience, Joshua is an expert in diamond market analytics and data-driven decision-making. As the current Head of Sales for Uni Diamonds—a leader in diamond technology and data-driven sourcing—Joshua uses real-time market insights to help Diamond Reserve clients purchase diamonds at the optimal intersection of quality and value.

Personalized Approach & Transparent Buying

Our goal at Diamond Reserve Co. is to simplify your diamond-buying journey. Joshua’s personal commitment, deep industry expertise, and mastery of diamond data translate into a shopping experience that's transparent, educational, and tailored specifically to you.

Ethically Sourced & Confident Buying

We proudly uphold strict ethical sourcing standards, ensuring every diamond offered through Diamond Reserve Co. is responsibly obtained, conflict-free, and certified by reputable authorities like GIA. Joshua personally oversees the sourcing of our diamonds, ensuring every stone aligns with our values of authenticity, sustainability, and exceptional quality.

Why Choose Diamond Reserve Co.?

Choosing Diamond Reserve Co. means choosing industry-leading expertise, transparency, and access to rare, exquisite diamonds you won't find elsewhere. Experience the difference of working directly with an industry expert who puts your interests first.

📅 Ready to experience the Diamond Reserve difference?
👉 Schedule Your Free Consultation Today