Yehuda Diamond Company

What Yehuda Diamond Company does

Yehuda Diamond Company (legal entity: Sherlock Holmes Detect Ltd.) is a privately-held Israeli-founded company, established in 1953 by Zvi Yehuda, that designs and manufactures AI-powered detectors for distinguishing natural diamonds from lab-grown (CVD, HPHT) stones and simulants (CZ, Moissanite). Its current product line comprises the Watson AI ($3,300) and Sherlock AI ($7,850) desktop detectors and the Big Sherlock ($22,000) high-volume unit, all requiring a mandatory $12.50/month subscription per account (transitioning from $10/month). The core technology combines a custom proprietary camera, proprietary optics and lighting conditions, and a cloud-based computer-vision AI model that analyzes six image modalities (RESULT, LUV, COLORED, GLOWING, ORIGINAL, SIMULANTS) to classify stones with reported 99%+ accuracy in internal testing on 14,112+ stones, backed by a patent-pending CZ detection method.

The company sells primarily to jewelry retailers, pawn shops, diamond dealers/wholesalers, and manufacturers across North America, South America, Europe, the Middle East, South and East Asia, and Oceania, reaching customers through direct e-commerce at yehuda.com and a network of 30+ specialty distributors including Berkshire Hathaway-owned RIO GRANDE, Sy Kessler, and I.David (Antwerp). The business model combines one-time hardware sales with recurring subscription revenue that funds continuous AI model training; customers can also purchase additional cloud storage beyond the included 1,000 test-result slots. Yehuda's stated roadmap includes scaling AI training to 100,000+ stones per category, adding AI feature enhancements such as multi-stone jewelry detection, small-stone identification down to 0.01 ct, per-stone confidence scoring, and adjustable confidence thresholds, and offering trade-in credits of $500–$2,500 to migrate customers from older Sherlock 1.0–4.0 and Dr. Watson units to the current AI generation. The company remains founder-led by Zvi Yehuda, is family-controlled, and discloses no external institutional investment.

Name

Yehuda Diamond Company

Legal name

Sherlock Holmes Detect Ltd.

Website

https://yehuda.com

Company type

Private

Founded year

1951

Operating status

Operating

Headcount range

1–10 employees

Short description

Yehuda Diamond Company designs and sells AI-powered detectors (Watson AI, Sherlock AI, Big Sherlock) that distinguish natural diamonds from lab-grown stones and simulants. The privately-held Israeli company serves jewelry retailers, pawn shops, dealers, and manufacturers across 14+ countries via direct sales and a global distributor network.

Ownership category

akta.pro rank

Product category

Diamond authentication equipment

NAICS

Analytical Laboratory Instrument Manufacturing (334516)

SIC

Laboratory Analytical Instruments (3826), Optical Instruments & Lenses (3827)

akta.pro primary industry

Diamond Grading & Certification Laboratories (CRAKAJAG)

akta.pro secondary industries

3D Vision, Depth Sensing & Point Cloud Analytics (HDAAAEAK), Diamond Jewelry (CRAKAAAA)

Keywords

• Diamond authentication equipment
• Lab-grown diamond detection
• Gemological testing instruments
• Jewelry fraud prevention
• Diamond verification devices

Headquarters

HQ city

New York

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales - Sherlock AI: Sale of Sherlock AI detector device. Price is $7,850 per unit. Includes trays, ring holders, power supply, and USB cables. This is the primary high-end product in the detector lineup.
2. Hardware Sales - Watson AI: Sale of Watson AI detector device. Price is $3,550 per unit. More compact version with smartphone integration via USB-C.
3. Hardware Sales - Big Sherlock: Sale of Big Sherlock detector for high-volume testing. Price is $22,000. Includes dedicated tablet and can check 108 rings at a time.
4. Monthly Subscription Fee: Mandatory monthly subscription of $12.50 (effective January 1, 2026; $10/month until that date). Covers app maintenance, AI model development, and 1,000 test results storage in Yehuda cloud. Subscription is per account and covers up to 10 detectors and unlimited users.
5. Additional Cloud Storage: Additional storage beyond the included 1,000 test results can be purchased directly through the app for users requiring more capacity.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

Yehuda Diamond Company designs, manufactures, and sells AI-powered hardware detectors (Sherlock AI, Watson AI, Big Sherlock) that distinguish natural diamonds from lab-grown (CVD, HPHT) and simulants (Cubic Zirconia, Moissanite) using a custom proprietary camera, multi-image fluorescence/phosphorescence analysis, and a cloud-based AI classification model. Each device requires a mandatory monthly subscription that funds ongoing AI development and cloud storage, and the company also offers a mobile app, a cloud back office, and a Clarity Enhancement Process (a legacy service that fills diamond inclusions with optically matched material).

Product overview

Yehuda Diamond Company's product portfolio centers on AI-powered lab-grown diamond detectors, comprising three current-generation products: Watson AI ($3,300), Sherlock AI ($7,850), and Big Sherlock ($22,000), all requiring a mandatory monthly subscription. These detectors use a custom proprietary camera and optics to capture six types of fluorescence and phosphorescence images per test, which are processed by a cloud-based AI model to classify stones as Natural Diamond, CVD (Chemical Vapor Deposition), HPHT (High Pressure High Temperature), CZ (Cubic Zirconia), or Moissanite. The Yehuda Detect mobile app (available on Google Play and Apple App Store) connects to the hardware via USB-C or Bluetooth and provides test execution, AI result display, and cloud storage. A cloud back office (cloud.yehuda.com) enables multi-user management, AI confidence score analysis, and custom stone marking. The company also offers an Upgrade/Trade-In Program for customers returning older detectors. Legacy products include Sherlock Holmes 4.0, Sherlock Holmes 3.0, and Dr. Watson, as well as the Clarity Enhancement Process — the company's foundational 1982 invention that inserts material into diamond inclusions to render them invisible.

Differentiator

Problem solved

Functional benefit

Brands

• Sherlock AI: AI-powered lab-grown diamond detector - premium model with larger capacity
• Watson AI
• Dr. Watson
• Sherlock Holmes 4.0
• Big Sherlock

Products and services

• Sherlock AI Professional-grade AI-powered lab-grown diamond detector with custom proprietary optics and camera, USB-C smartphone connectivity, multiple trays and magnetic ring holders, and worldwide power supply. Classifies natural diamonds, CVD, HPHT, Cubic Zirconia, and Moissanite via the cloud-based AI model. Priced at $7,300 with a mandatory $12.50/month subscription.
• Watson AI Compact, portable AI-powered lab-grown diamond detector with custom proprietary camera, advanced optics, and USB-C smartphone connectivity. Identifies Natural, CVD, HPHT, CZ, and Moissanite stones via the cloud-based AI model. Priced at $3,300 with a mandatory $12.50/month subscription.
• Big Sherlock High-capacity lab-grown diamond detector bundled with a dedicated tablet that checks up to 108 rings at a time, using the same detection method as the Sherlock Holmes 2.0 (100% detection rate). Designed for high-volume testing environments such as manufacturers and wholesalers. Priced at $22,000.
• Dr. Watson Lightweight, portable, rechargeable lab-grown diamond detector that checks up to 8 rings at a time or approximately 50 carats of loose diamonds, using the same detection method as other Yehuda detectors. Features Bluetooth or cable connectivity, cloud storage, multi-user support, and customizable test records. Available at $2,795.
• Sherlock Holmes 4.0 Portable lightweight lab-grown diamond detector from the previous generation that checks up to 27 rings at a time or 20 rings on 2 rotating finger ring holders and accommodates approximately 250 carats of loose diamonds. Newer AI-powered devices have superseded it, but it remains available with the $12.50/month subscription covering storage and updates.
• Yehuda AI Cloud (cloud.yehuda.com) Cloud-based back office and gallery for managing test results, viewing per-stone AI confidence scores, adjusting confidence thresholds, generating custom AI analyses on manually marked stones, downloading test data, and managing multi-user accounts. The AI model is fully cloud-based and requires internet connectivity.
• Yehuda AI App (Sherlock Holmes Detect) Mobile app that powers all Yehuda detector hardware. Connects to detectors via Bluetooth or USB, captures test images, runs cloud-based AI classification (advisory), stores results to the cloud, and provides a back office for test management. Available on Google Play and Apple App Store and covered by the $12.50/month per-account subscription covering up to 10 detectors and unlimited users.
• Yehuda AI Subscription Mandatory monthly subscription at $12.50 per account (effective January 1, 2026; $10/month until that date). Covers app maintenance and updates, ongoing AI model development and training, and 1,000 test-result storage slots in the Yehuda cloud. Per-account pricing covers up to 10 detectors and any number of users, with additional cloud storage available for in-app purchase. Fee guaranteed not to increase for at least 3 years.
• Clarity Enhancement Process Yehuda's proprietary service that inserts a microscopic amount of material with the same optical properties as a diamond into diamond inclusions (feathers) to make them invisible to the naked eye. Invented by Zvi Yehuda in 1982, this was the company's foundational offering before its move into diamond detection.

Quantifiable outcome

• 99%+ accuracy in detecting lab-grown diamonds (AI model in internal testing)
• +4 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration6 records

AI capability5 records

Feature9 records

Partnerships

19 partnerships are on record, tiered core and major.

• StripecoreTechnology or IntegrationThird-party payment processor handling credit card transactions. Processes payment information in accordance with Stripe's privacy policy. Yehuda does not store credit card details in their own database.
• Sy Kessler Sales, Inc and GemOro ProductsmajorChannel Partner/ Reseller/ DistributorNorth American distributor based in Dallas, TX. Part of the Zvi Yehuda Worldwide Group network.
• A&A Jewelry & ToolsmajorChannel Partner/ Reseller/ DistributorLos Angeles-based distributor serving the jewelry industry in the western United States.
• KassoymajorChannel Partner/ Reseller/ DistributorDistributor based in Plainview, NY serving the jewelry tools market.
• Gesswein & Co., Inc.majorChannel Partner/ Reseller/ DistributorBridgeport, CT-based distributor specializing in jewelry tools and supplies.
• QUALITY GOLD, INC.majorChannel Partner/ Reseller/ DistributorFairfield-based distributor serving the jewelry industry with Yehuda products.
• RIO GRANDEmajorChannel Partner/ Reseller/ DistributorAlbuquerque, NM-based jewelry tools distributor, part of Berkshire Hathaway company.
• I.DavidmajorChannel Partner/ Reseller/ DistributorAntwerp, Belgium-based distributor serving the European market from the heart of the diamond trade.
• A. Gul KGmajorChannel Partner/ Reseller/ DistributorPforzheim, Germany-based distributor serving the German jewelry market.
• WORLD DIAMOND GROUP S.P.A.majorChannel Partner/ Reseller/ DistributorVicenza, Italy-based distributor serving the Italian jewelry industry.
• B K EnterprisemajorChannel Partner/ Reseller/ DistributorMumbai, India-based distributor serving the Indian jewelry and diamond market.
• Leviev LtdmajorChannel Partner/ Reseller/ DistributorRichmond Hill, Ontario, Canada-based distributor serving the Canadian market.
• Searay Pty LtdmajorChannel Partner/ Reseller/ DistributorThomastown, Australia-based distributor serving Australia and New Zealand.
• Cactus do BrazilmajorChannel Partner/ Reseller/ DistributorSao Paulo, Brazil-based distributor serving the South American market.
• Ido Itskovich - Pawn Industry RepresentativemajorChannel Partner/ Reseller/ DistributorLas Vegas, NV-based representative specializing in serving the pawn shop industry across the United States.
• SuzuhomajorChannel Partner/ Reseller/ DistributorTokyo, Japan-based distributor serving the Japanese jewelry market.
• Piramit Teknik Malzeme San ve Tic. A.Ş.majorChannel Partner/ Reseller/ DistributorIstanbul, Turkey-based distributor serving the Turkish market.
• Google (Google Play)coreTechnology or IntegrationYehuda app distributed through Google Play Store. Users are required to create a Google account to download the app and receive software updates.
• Apple (App Store)coreTechnology or IntegrationYehuda app distributed through Apple App Store for iOS devices.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Sarine Technologies: Israel-based provider of automated diamond scanning, grading, and traceability systems (Sarine Galaxy, Sarine Diamond Journey). Comparable in applying advanced optical/AI instrumentation to diamond authentication and grading workflows, including lab-grown detection.
• SmartPro / GemOro Tester: Brand of portable diamond and moissanite testers (Diamond Selector II, etc.) widely sold in the jewelry tools channel. Competes directly with Yehuda's Dr. Watson and lower-tier portable instruments for retail and pawn-shop buyers.
• Presidium: Singapore-based manufacturer of portable diamond and moissanite testers (e.g., Presidium Diamond Tester, PDT). Direct competitor in handheld/portable gem authenticity instruments sold to the same jewelry retail and pawn-shop customers Yehuda targets.

Emerging players

• Octonus: Developer of computer-vision diamond analysis software (cut grading, inclusion mapping, light performance). Emerging software-led peer applying AI to gem analysis with partial overlap in lab-grown identification for manufacturers and graders.
• DiamaSense / DRC Techno: Developer of advanced diamond screening instruments (e.g., Diamond Inspection devices used for rough and polished diamond screening). Niche emerging player competing in the same lab-grown vs. natural detection category with institutional buyers.

Broad incumbents

• Gemological Institute of America (GIA): The dominant global diamond grading and certification authority operating laboratories, instruments (GIA iD100), and educational programs. Broad incumbent with overlap in lab-grown detection instruments (iD100) used by retailers and dealers Yehuda also serves.
• International Gemological Institute (IGI): Global gem grading and certification laboratory with diamond authentication services and instruments. Overlaps with Yehuda in providing verification and certification infrastructure for natural vs. lab-grown diamonds to jewelry retailers.
• De Beers Group / Forevermark: Major diamond producer with proprietary verification services (e.g., Tracr blockchain, De Beers Institute of Diamonds) for natural diamond authentication and origin tracking. Adjacent incumbent addressing the same natural-vs-lab-grown integrity problem at industry scale.
• HRD Antwerp: Belgian diamond grading and certification lab based in the Antwerp diamond district. Operates authentication services and equipment for natural vs. synthetic diamond identification, addressing the same industry need as Yehuda.

Regional players

• Guangzhou WJDiamond Equipment: China-based manufacturer of diamond and gem testing instruments including moissanite and CZ detectors. Regional peer serving primarily Asian markets with comparable low-cost portable diamond authentication devices.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/yehudadiamonds
• LinkedInlinkedin.com/company/yehuda-diamond-company

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 records

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 Yehuda Diamond Company