GemID: Gem Identifier
Utilities
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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Identify gemstones like a professional.
GemID guides you through systematic gemstone identification using the same optical and physical properties professional gemologists rely on — refractive index, specific gravity, fluorescence, pleochroism, and more.
119 gems in the database
From common stones like quartz and topaz to rare collector gems like alexandrite, tanzanite, and demantoid garnet.
Instrument test guidance
Step-by-step guidance for refractometer, polariscope, spectroscope, UV lamp, and specific gravity testing. Know what to look for and what it means.
Origin & treatment testing (Pro)
Two-phase testing workflow helps identify natural vs. lab-grown stones and detect common treatments like heat, fracture filling, and beryllium diffusion.
Collection management
Save identified stones to profiles, track acquisition details, and export professional examination records.
Built for gemologists, jewelers, appraisers, and serious collectors.
GemID documents your examination process — it does not replace a certified gemological laboratory.
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Ratings & Reviews
New Features
- Quick ID mode — observable-only identification for beginners (no instruments required)
- "What Test Next?" drill question type — trains users on test sequencing
- Confusion pair drill mode — focus practice on commonly confused gems (130 gems enriched with confusedWith pairs)
- Gem-A FGA Section D exam simulator — partial credit scoring, constants sheet, strike system
- FEEG 12-stone European Gemmologist exam simulator
- Half-exam options for Gem-A (6 stones, 1h35m) and FEEG (6 stones, 2h15m)
- Exam readiness score — tracks preparedness before attempting mock exams
- Guided onboarding walkthrough — interactive Ruby identification that teaches the workflow step-by-step
- Exam study guide pages — static web pages for GIA, Gem-A, and FEEG prep
The developer, GemID Labs, 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 Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- User Content
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Compton Consulting Incorporated
- Size
- 77.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 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
- GemID Team Pro (Annual) $399.99
- GemID Team Pro (Monthly) $49.99
- Hobbyist Monthly $6.99
- Pro Annual $149.99
- Pro Monthly $19.99
- Hobbyist Annual $49.99
- Copyright
- © 2026 Compton Consulting Incorporated