Direct Manufacturing
Sourcing Categories
Direct access to our primary manufacturing inventory including certified stones, bespoke bridal collections, and heritage gemstones.
3 Generations of
Manufacturing Mastery
From raw earth to refined brilliance. We control every stage of the diamond lifecycle, ensuring unparalleled quality for both natural and lab-grown diamonds.
Precision Sourcing
Ethically sourced rough stones through the Kimberley Process for Natural diamonds, and premium seed selection for Lab-Grown (CVD/HPHT).
Advanced Planning
Utilizing AI-driven Sarine mapping to analyze rough stones and determine the optimal cut for maximum brilliance and fire.
Master Manufacturing
From laser sawing to bruting and precision blocking. Each facet is handcrafted by master artisans with 3 generations of heritage.
Quality Certification
Rigorous internal grading followed by independent GIA, IGI, or HRD certification to guarantee absolute authenticity and quality.
Natural Diamonds
Our natural diamond expertise spans decades. We handle large-scale rough procurement and utilize state-of-the-art laser processing to ensure maximum recovery and clarity.
- Conflict-Free Guarantee
- GIA/IGI Certification
- Investment Grade Sourcing
Lab-Grown Innovation
Leading the shift in sustainable luxury. Our CVD and HPHT growth processes produce Type IIa diamonds—the purest form of carbon, identical to the finest natural stones.
- Sustainable Technology
- Type IIa Purity
- Full Traceability
International Trade Across Continents
Amstela operates from the world's leading diamond capitals, offering dealers localized support and direct access to our manufacturing infrastructure. We provide secure, insured shipping to all major jewellery hubs globally.
By The Numbers
500+
Dealers
Verified trade partners
10K+
SKUs
Updated live daily
50+
Countries
Global delivery
15+
Years
Industry excellence
Global Shipping Network
Secure, insured door-to-door delivery within 72 hours for all verified B2B trade partners globally.
Partner Testimonials
Insights from verified international dealers and luxury jewellery brands.
“Amstela has transformed our sourcing process. Their certified inventory and responsive trade desk means we can fulfil client orders faster than ever before.”
Marcus van den Berg
Van den Berg Diamond House
Antwerp, Belgium
“The quality consistency and GIA certification on every stone gives our customers complete confidence. We have been sourcing exclusively through Amstela for three years.”
Priya Mehta
Mehta Fine Jewels
Mumbai, India
“Access to 10,000+ SKUs from a single trusted partner has simplified our entire procurement workflow. The rapid enquiry response is genuinely unmatched in the trade.”
James Whitfield
Whitfield & Associates
New York, USA
Expand Your Inventory Today
Join Amstela's global network of verified dealers for direct access to premium diamond and jewellery feedstock.