A.Gul

What A.Gul does

A.Gul KG (legal name: Aharon Gul KG) is a family-owned B2B diamond wholesaler headquartered in Pforzheim, Germany, founded in 1967 by Aharon Gul and led since 1990 by his son Eitan Gul as owner and managing director. The firm operates a wholly-owned subsidiary in Ramat-Gan, Israel, established in 1994, and serves an international customer base spanning leading jewelry and watch manufacturers, jewelers, retailers, financial institutions, and high-net-worth individuals. A.Gul is the first Responsible Jewellery Council (RJC) Code of Practices certified diamond wholesaler in Germany, the only German member of the World Diamond Council, and an accredited Ethical Member of the International Colored Gemstone Association.

The company's product portfolio spans melee and calibrated diamonds (0.7–4.0mm), certified solitaire diamonds (0.30ct+ with GIA/HRD/IGI), fancy color diamonds across the full hue spectrum, and colored gemstones including Colombian emeralds through its EsmeraldaGul sub-brand. Its proprietary technology stack includes an in-house gemological laboratory equipped with the DeBeers AMS2 verification device (ASSURE ID: 678514), distribution rights for Yehuda Sherlock diamond detectors (sub-branded as Sherlock by GUL), and a blockchain-based Tracr Prov-T provenance offering for which the firm serves as the official European Ambassador. Other revenue streams include a Diamond Market Maker service for institutional investors, a buyback operation covering diamonds and colored gemstones, training seminars, and the Yakinta B2B2C sales platform launched in 2025.

A.Gul generates revenue through a transaction-based wholesale model with quote-based pricing and login-protected price lists in five diamond categories, complemented by professional services fees for investment advisory and education. The go-to-market blends B2B field and inside sales, an e-commerce platform (gul.de plus mobile app), DTC online storefronts for fancy color and emerald collections, and a presence at major industry trade shows (Inhorgenta, Vicenzaoro) and standards organizations (WDC, RJC, ICA, UN Global Compact, WJI 2030). The business is currently undergoing a three-generation succession, with all three of Eitan Gul's sons having joined between 2020 and 2024.

Name

A.Gul

Legal name

Aharon Gul KG

Website

https://gul.de

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

11–50 employees

Short description

A.Gul KG is a family-owned B2B diamond and gemstone wholesaler founded in 1967 in Pforzheim, Germany, serving jewelry and watch manufacturers, jewelers, financial institutions, and high-net-worth investors across Europe with certified, traceable, and 100% natural diamonds.

Ownership category

akta.pro rank

Product category

Diamond Wholesale Trading

NAICS

Jewelry, Watch, Precious Stone, and Precious Metal Merchant Wholesalers (423940)

SIC

Wholesale-Jewelry, Watches, Precious Stones & Metals (5094)

akta.pro primary industry

Polished Diamond Trading & Brokerage (CRAKAJAD)

akta.pro secondary industries

Traceability, Provenance & Compliance Services (e.g., origin, AML/KYC, sanctions) (CRAKAJAL), Fine Jewelry Wholesale & Trading (CRAKAAAL)

Keywords

• Wholesale diamonds
• Fancy color diamonds
• Colored gemstones
• Diamond investment
• Jewelry manufacturer supply

Headquarters

HQ city

Pforzheim

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Wholesale Diamond Trading: Core B2B revenue stream through the sale of natural diamonds to jewelry manufacturers, watch manufacturers, jewelers, and retailers across Europe. Includes calibrated diamonds (0.7-4.0mm), certified diamonds (from 0.30ct with GIA, HRD, IGI certifications), premium cuts, fancy color diamonds, and colored gemstones.
2. Online Shop Sales: Direct-to-consumer and B2B sales through the company's e-commerce platform featuring fancy color diamonds, individual unique items, and Colombian emeralds.
3. Diamond Investment Services: Consulting and advisory services for high-net-worth individuals and institutional investors seeking diamonds as an alternative investment asset class. The company acts as a Diamond Market Maker providing real-time trading prices.
4. Diamond Buyback Services: Purchase of diamonds, colored diamonds, jewelry, rubies, emeralds, sapphires, and other gemstones from clients. Process includes online evaluation form, expert assessment, and payment within 1-2 business days.
5. Education and Training Seminars: Training seminars provided to customers as part of the service offering.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels5 records

Core offering

A.Gul KG is a wholesale trader of natural diamonds, fancy color diamonds, and colored gemstones (Colombian emeralds, rubies, sapphires) sold B2B to jewelry and watch manufacturers, jewelers, and financial institutions across Europe. Offerings span melee (0.7–4.0mm), certified stones (0.30ct+ with GIA/HRD/IGI), premium and fancy cuts, plus colored gemstones. Complementary services include diamond investment advisory, market maker services, diamond buyback, and education seminars, all delivered via field/inside sales, a login-gated online shop, and the Yakinta B2B2C platform for jewelers.

Product overview

A.Gul KG is a German B2B diamond wholesaler and European market leader founded in 1967, operating a multi-channel product portfolio anchored by its online shop (gul.de/online-shop/) and mobile app. The offering spans certified white diamonds, fancy color diamonds in all hues (yellow, pink, blue, green, red, purple, orange, brown, black, gray, and white), and colored gemstones including Colombian emeralds via EsmeraldaGul and rubies and sapphires. A proprietary sub-brand, Yakinta, provides a B2B2C sales platform for jewelers, while Sherlock by Gul offers Yehuda diamond detector devices for synthetic diamond screening. Investment-grade services include diamond investment advisory, ESG investing, and rarity reports for high-net-worth and institutional clients. Tracr Prov-T diamonds, accessible through the online platform, provide blockchain-verified provenance. Additional offerings include buy/sell services, the curated Alexander's Choice collection, unique single pieces, price lists, and a comprehensive education center covering the 4 Cs, fancy color diamonds, gemstone knowledge, and investment guidance.

Differentiator

Problem solved

Functional benefit

Brands

• Sherlock by Gul: Diamond testing devices (Dr. Watson, Sherlock Holmes 4.0, Big Sherlock) manufactured by Yehuda for identifying natural vs. synthetic diamonds
• Yakinta
• Esmeralda Gul

Products and services

• Online Shop (Wholesale Diamond E-Commerce) B2B e-commerce platform for registered customers to browse and purchase certified white diamonds, melee, fancy cuts, fancy color diamonds, and unique single pieces, with comparison tools and category-specific price lists.
• Sherlock by GUL Diamond Detectors Distributed line of Yehuda diamond verification devices (Dr. Watson, Sherlock Holmes 4.0, Big Sherlock) designed to distinguish natural diamonds from synthetic CVD and HPHT diamonds in all sizes, loose or mounted, with smartphone connectivity for continuous software updates.
• Yakinta B2B2C Sales Platform Innovative B2B2C sales solution platform for jewelers and goldsmiths, enabling digital sales and customer management for retail jewelry businesses.
• Diamond Investment Services Advisory and brokerage services for high-net-worth individuals and institutional investors seeking diamond investment portfolios, including rarity reports, ESG investing guidance, and market maker pricing for investment-grade diamonds.
• Diamond and Gemstone Buyback Services Purchase service for diamonds, fancy color diamonds, gemstones (ruby, sapphire, emerald, others), and jewelry, with a 5-step evaluation and payment process completing within 1–2 business days.
• EsmeraldaGul (Colombian Emerald Shop) Dedicated online shop for Colombian emeralds and sourced colored gemstones, operating as a sub-brand alongside the main diamond business.
• Tracr Prov-T Traceable Diamonds Blockchain-traceable natural diamonds offered through the Tracr platform, enabling B2B partners and consumers to verify origin and provenance at point of sale via QR code scanning on GIA certificates.
• Alexander's Choice (Curated Rare Gemstones) Curated collection of rare fancy color and unique gemstones personally selected by Alexander Gul, offering exceptional stones with detailed specifications including cut, carat, color, clarity, and certification.
• Zimmi Yellow Diamond Collection Exclusive collection of rare Zimmi yellow diamonds sourced personally by Alexander Gul through dedicated international sourcing journeys.

Quantifiable outcome

• Every diamond is checked twice to guarantee 100% natural diamonds
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

13 partnerships are on record, tiered flagship, core and supporting.

• Tracr (De Beers)flagshipStrategic or Co-development Partner · 1 August 2025A.Gul KG serves as the European Ambassador for Tracr, the leading digital platform for natural diamond traceability. This strategic partnership enables the company to offer Tracr Prov-T diamonds with complete provenance tracking from mine to jewelry, providing QR code access to the diamond's origin, journey, and transformation through certified visuals and data.
• Responsible Jewellery Council (RJC)coreOthersRJC is the leading international standards organization for the jewelry and watch industry. A.Gul KG was the first certified diamond wholesaler in Germany, achieving COP certification since 2013 with ongoing recertification demonstrating commitment to responsible business practices.
• World Diamond Council (WDC)coreOthersWDC is a non-profit organization representing the entire diamond industry value chain. A.Gul KG is the only German representative among 40 industry leaders since 2020. The company also participates in the Kimberley Process Task Force (KPTF) and various KP working groups.
• International Colored Gemstone Association (ICA)coreOthersICA is the only worldwide organization specifically founded for the benefit of the global colored gemstone industry. A.Gul KG is a voting member and has been accredited as an Ethical Member since 2021.
• Watch & Jewellery Initiative 2030 (WJI 2030)coreOthersWJI 2030 was launched by Cartier and Kering based on shared belief that sustainable development goals can only be achieved through collective efforts. A.Gul KG joined in March 2023 and is a member of the WJI 2030 Innovation & New Technologies Committee.
• UN Global CompactcoreOthersThe UN Global Compact is a voluntary leadership platform for developing, implementing, and disclosing responsible business practices. A.Gul KG became a participant in 2023 as part of over 17,000 companies committed to building a sustainable future.
• iTraceiTsupportingTechnology or IntegrationiTraceiT is a diamond traceability system. A.Gul KG became a member in 2024 as part of their commitment to traceability, transparency, and ethical practices in their supply chain.
• Yehuda (Sherlock by GUL)supportingChannel Partner/ Reseller/ DistributorA.Gul KG distributes Yehuda diamond detectors including Dr. Watson, Sherlock Holmes 4.0, and Big Sherlock. These devices distinguish natural diamonds from synthetic CVD and HPHT diamonds with smartphone connectivity for continuous software updates.
• Fancy Color Research FoundationsupportingOthersA.Gul KG became a member in 2024, supporting research and education in fancy color diamonds.
• Natural Diamond Council (ASSURE Program)supportingTechnology or IntegrationThe ASSURE Program evaluates diamond verification device performance through rigorous testing. A.Gul KG uses DeBeers AMS2 (ASSURE ID: 678514) for rough diamond verification and distributes Yehuda detectors that achieved 100% detection rate in ASSURE 2.0 testing.
• Climate-PartnersupportingOthersA.Gul KG is certified as a climate-neutral company by Climate-Partner, demonstrating their commitment to environmental responsibility.
• Kimberley ProcesscoreOthersA.Gul KG guarantees all diamonds are sourced in compliance with the Kimberley Process Certification Scheme (KPCS), a government-backed program working to prevent the flow of conflict diamonds.
• Women's Empowerment Principles (WEPs)supportingOthersWEPs are principles established by UN Global Compact and UN Women to guide companies in promoting gender equality. A.Gul KG has been a signatory since December 2022, demonstrating commitment to gender equality in the workplace.

Scale indicators5 records

Recent moves10 records

Expansion highlights6 records

Direct peers

• KGK Group: India-headquartered, vertically integrated diamond manufacturer and gemstone dealer with offices in Hong Kong, Antwerp, and New York. Comparable in offering a broad B2B assortment of certified diamonds and colored gemstones to jewelry manufacturers and retailers.
• Rosy Blue: One of the world's largest diamond manufacturers and B2B wholesalers, headquartered in Belgium with significant Indian manufacturing. Operates an integrated rough-to-polished supply chain serving global jewelry manufacturers, directly comparable to A.Gul's B2B wholesale model and customer segments.
• Diarough: Belgian-headquartered global diamond manufacturer and wholesaler with production in India, Thailand, and Botswana. Serves jewelry retailers and manufacturers worldwide, mirroring A.Gul's positioning as a mid-sized B2B wholesaler with calibrated melee and certified stones.
• Leibish & Co. Specialist fancy color diamond dealer and online retailer with significant B2B supply. Shares A.Gul's deep fancy color diamond catalog, online shop model, and emphasis on natural diamond expertise and education.
• Leo Schachter Diamonds: Global diamond cutter and manufacturer with operations in Israel, India, and New York. Serves B2B jewelry retailers and manufacturers with calibrated and certified diamonds, comparable to A.Gul's wholesale breadth and customer mix.
• Dalumi Diamonds: Israel-based diamond manufacturer and supplier operating from Ramat-Gan, specializing in polished and fancy color diamonds. Highly comparable as a mid-sized specialty wholesaler serving international jewelry clients with a similar fancy-color focus.
• Arcticircle Group: Antwerp-based specialist supplier of natural fancy color diamonds to jewelry manufacturers and retailers. A close niche competitor to A.Gul's fancy color diamond business with similar certification, traceability, and B2B distribution focus.

Emerging players

• Muzo International: Vertically integrated Colombian emerald miner and marketer with direct-to-consumer and B2B channels. Comparable for A.Gul's EsmeraldaGul sub-brand as both operate in traceable, origin-attributed colored gemstone B2B distribution.

Broad incumbents

• De Beers Group: World's leading diamond miner and rough diamond supplier and owner of the Tracr traceability platform with which A.Gul is the European Ambassador. A broad incumbent that shapes industry standards and is both a partner and an upstream competitor in B2B diamond distribution.
• ALROSA: Russian state-controlled diamond miner and one of the world's largest rough diamond producers with integrated polishing and B2B sales. A broad incumbent in the same value chain as A.Gul, relevant as a large-scale competitor and supply source.

Market position

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/AGulKG
• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/gul-diamonds

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about A.Gul