DiamondMaster
Wholesale Diamond Market Guide
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Same diamond. A wider world of value. Use DiamondMaster to compare natural and created diamond values across 27 Cost units: FIAT currencies, precious metals, and crypto.
ONE DIAMOND. TWENTY-SEVEN WAYS TO MEASURE ITS VALUE.
What changes when you measure a diamond in gold instead of dollars? Or Bitcoin instead of Swiss francs?
DiamondMaster helps diamond professionals, gemologists, appraisers, buyers and traders explore wholesale reference values for Mined-Natural and Grown-Created diamonds. Compare classifications, adjust your pricing basis, and see how a different exchange unit changes the picture.
Developed by Wayne D. Prentice, Graduate Gemologist and former GIA Resident Gemology Instructor, DiamondMaster brings gemological knowledge and the BrightList wholesale reference guide together on iPhone and iPad.
EXPLORE THE 8 C'S
Cut Shape, Carat, Color, Clarity, Cut Grade, Cost, Change in Value and Creation—the diamond's natural or laboratory-grown origin.
• 10 shapes: Round, Pear, Emerald, Princess, Marquise, Oval, Radiant, Cushion, Trilliant and Heart.
• Shape-specific carat selections, with 46 categories for Round, from 0.01 ct through the 10–10.99 ct range.
• 10 color grades, D–M, and 10 clarity grades, IF–I-3.
• Five cut-grade selections, Excellent through Poor.
• Separate natural and lab-grown reference datasets.
• Per-carat and total reference values, dimension guidelines, grading descriptions and shape-specific gemological information.
27 COST UNITS WITH BRIGHTLIST
Keep the diamond selection. Change the measuring stick.
12 currencies:
USD, EUR, JPY, CHF, CAD, GBP, AUD, BRL, RUB, INR, CNY and ZAR.
2 basket references:
• XDR: the IMF's Special Drawing Right.
• XUNT: DiamondMaster's calculated reference for the proposed gold-and-currency BRICS+ "THE UNIT" basket.
6 precious-metal units:
• Gold (XAU), platinum (XPT) and silver (XAG), each by troy ounce.
• Gold by gram: Denari (XDEN).
• Gold by 100 grams: Centum (XCEN).
• Gold by kilogram: Milia (XMIL).
7 crypto assets:
Bitcoin (BTC), Ethereum (ETH), Litecoin (LTC), Cardano (ADA), Solana (SOL), PAX Gold (PAXG) and Zcash (ZEC).
COMPARE ACROSS TIME
Natural-diamond screens show 1-year and 5-year percentage changes in your selected Cost unit. By liberating diamond valuation from the traditional US Dollar peg, the 'Bright List' normalizes a diamond's intrinsic scarcity, extraction costs, and luxury premium across 27 distinct economic units. Whether you are tracking a gem by its 4 C’s or analyzing macro liquidity shifts, our advanced dual-period tracking over 1- and 5-year intervals reveals the true reality of wealth: letting you see instantly whether your diamond is genuinely appreciating, or if your chosen currency is losing its purchasing power.
MAKE THE LIST YOUR OWN
Use the Global Value Adjuster to apply a discount or premium across diamond calculations. Explore your preferred buying or selling basis, or return to LIST with a 1.00 multiplier.
DEMO AND SUBSCRIBER ACCESS
Without an active subscription, explore the calculators using older demonstration data and a smaller Cost-unit selection.
A BrightList subscription unlocks subscriber diamond reference datasets and all 27 Cost units. Exchange data refreshes on a daily cycle when connectivity and source data allow. Values may use earlier saved or supplied data; this is not a continuous trading feed.
SUBSCRIPTIONS
Choose from 7-day, 1-month, 6-month or 1-year auto-renewing plans. Current prices and terms appear in the app before purchase. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Renewal is charged within the preceding 24 hours. Manage or cancel in Apple Account settings. Use Restore Subscription to check existing access.
Reference values are not individual appraisals, purchase offers or guaranteed resale prices. DiamondMaster does not execute trades.
Privacy Policy: https://www.diamondmaster.net/privacy_policy.php
Terms of Use: https://www.diamondmaster.net/terms_of_use.php
- This app’s overall rating was recently reset.
SAME DIAMOND. A WIDER WORLD OF VALUE.
This major update expands DiamondMaster's subscriber selection from 13 to 27 Cost units, bringing more ways to compare Mined-Natural and Grown-Created diamond reference values, and changes between cost units - revealing the true reality of wealth: letting you see instantly whether your diamond is genuinely appreciating, or if your chosen currency is losing its purchasing power.
MORE CURRENCIES
Compare in 12 fiat currencies, including the addition of the South African rand (ZAR).
MORE PRECIOUS-METAL REFERENCES
Explore gold, platinum and silver by troy ounce. Gold also has dedicated gram, 100-gram and kilogram choices: Denari (XDEN), Centum (XCEN) and Milia (XMIL).
CRYPTO COMPARISONS
Express diamond reference values in BTC, ETH, LTC, ADA, SOL, PAXG and ZEC, alongside currencies and metals.
A NEW SOVEREIGN BASKET PERSPECTIVE
Explore XUNT, DiamondMaster's calculated reference for the proposed gold-and-currency BRICS+ "THE UNIT" basket (XUNT), alongside the IMF's Special Drawing Right (XDR). Follow the East's core decentralized unit who's value that is backed by 40% physical gold held in Central Banks vs the West's core centralized unit (IMF/Federal Reserve) that is backed by debt of 5 top global economies debt/FIAT weighted according to GDP.
DAILY EXCHANGE-DATA REFRESHES
Currency, metal and crypto reference updates bring a broader exchange perspective to your calculations. Refreshes depend on connectivity and source availability; earlier saved or supplied values may remain in use.
PUT THE NEW UNITS TO WORK
Keep the same diamond classification and switch Cost units. Natural-diamond screens show 1-year and 5-year percentage changes in the selected unit where positive gains-appreciation-inflation are displayed in green, and negative losses-devaluation-deflation are displayed in red. The Global Value Adjuster now has a higher range to apply a preferred discount or premium for your use: if buying or selling for wholesale, retail valuation, cash-estate values, to distress liquidation.
Historical BRICS+ XUNT comparisons earlier than the "Pumpkin" October 31, 2025 cast date are reconstructed and the refreshed PAXG 5-year reference (before PAXG's minting date) uses gold as a proxy. Historical percentages are available for natural diamonds; lab-grown screens show per-carat and total reference values.
An active BrightList subscription is required for subscriber data and all 27 Cost units. Unsubscribed users can continue exploring with older demonstration data.
Already subscribed? Open Subscription Options and use Restore Subscription if your access does not appear after updating or changing devices.
The developer, Wayne D. Prentice, G.G., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Wayne Prentice
- Size
- 24.5 MB
- Category
- Business
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 13.3 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Wholesale "Bright List" 1 wk. $6.99
- Wholesale "Bright List" 1 mo. $24.99
- Wholesale "Bright List" 1 yr. $199.99
- Wholesale "Bright List" 6 mo. $109.99
- Copyright
- © Wayne D. Prentice, G.G.