Loupewise: Gem Identification
Exam study. Identify & catalog
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Loupewise (formerly GemID) is a complete toolkit for gemstone identification and gemology study. Enter your instrument readings and it narrows the candidates; catalog your stones; generate examination reports; and prepare for your diploma exams — one app across your whole path, from first flashcard to first client report.
Loupewise is an educational reference tool for gemological observation. It is not a substitute for professional laboratory testing or a certified gemologist's opinion.
IDENTIFY STONES FROM YOUR OBSERVATIONS There is no camera step and no image recognition. You take the readings; the app does the elimination, and shows you which reading ruled each candidate out. Loupewise comes to the workbench with you. Enter your refractometer, hydrostatic scale, UV lamp, polariscope, and loupe readings, and the app cross-references them against 130+ gem species and varieties — returning only the candidates genuinely consistent with your data, with the full elimination path shown. Read RI 1.544 and SG 2.65? Loupewise shows that's consistent with quartz, and the one test that narrows it further. The logic is transparent; the reasoning stays yours.
NATURAL VS SYNTHETIC & TREATMENT TESTING A two-phase origin workflow: enter inclusions, growth structures, fluorescence, and spectroscopy observations, and Loupewise walks the differential for natural vs. synthetic and heated vs. unheated. Treatment coverage includes heat, diffusion, glass-filling, fracture-filling, and coating.
TRACK YOUR COLLECTION Save each identification with its readings and elimination trail. Build a catalog of your stones you can search and revisit.
EXAMINATION REPORTS Turn a saved identification into a clean, shareable examination report with your observations, the candidate reasoning, and your notes — for your records or your clients.
A MAINTAINED REFERENCE DATABASE 130+ gem species and varieties across every major family — corundum, beryl, chrysoberyl, garnet species, tourmaline, quartz, feldspar, opal, jadeite, nephrite, spinel, topaz, peridot, zircon, tanzanite, and more — with refractive index, specific gravity, optic character, pleochroism, fluorescence, and the diagnostics that separate look-alikes. Where the exam bodies publish different reference values, Loupewise shows both, tagged to the exam that grades you.
PRACTICE EXAMS FOR GEMOLOGY STUDENTS Preparing for a diploma? Loupewise includes practice exams built for the GIA 20-stone, Gem-A FGA, and FEEG European Gemmologist exams. Identify unknown stones under exam conditions, and a readiness score tracks how prepared you are across the property categories examiners test.
DRILL WITH SPACED REPETITION Build property recall between sessions. 23 question types across refractive index, specific gravity, optic character, pleochroism, fluorescence, natural vs. synthetic indicators, treatment detection, and key differentiators. Filter by family, color, instrument, or confusion pairs. Spaced-repetition scheduling surfaces the cards you're weakest on.
15 LANGUAGES Available in 15 languages.
7-DAY PRO TRIAL — NO CARD REQUIRED Every account starts with a full 7-day Pro trial. After it, continue free with daily drills, full instrument input, and the full named candidate list for every identification. Hobbyist adds unlimited drills and your saved collection; Pro adds examination reports and the full exam simulators.
WHO USES LOUPEWISE
• Collectors and enthusiasts identifying and cataloging their stones
• Gemology students preparing for GIA, Gem-A, and FEEG exams
• Working gemologists and appraisers at the bench
Loupewise is an independent tool. It is not affiliated with, endorsed by, or sponsored by GIA, Gem-A, or FEEG. Always verify important identifications with an accredited gemological laboratory.
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Ratings & Reviews
New
- Goal chooser on first launch: people say what they came for (identify a stone, or exam prep) and the app starts there. Your new customer picked "exam prep".
- Free CSV export of any collection, on every tier. It round-trips through Import.
- Test Treatments works for all 132 gems. It used to be unreachable for most stones (D11).
- A new landing screen (in all 15 languages) with a plain trust line: no camera, no machine learning.
- More of the app in 14 languages: the identify screen's 20 instrument hints, the trial button, the Pro tier list and the walkthrough prompts.
Fixed
- The paywall no longer closes the screens underneath it after a purchase. This is today's fix.
- The Hobbyist plan subtitle no longer claims "Unlimited".
- Spectroscope labels print as Fe/Mn/Cr instead of FE/MN/CR.
- Cat's-eye chrysoberyl: reporting "no milk-and-honey effect" no longer wrongly rules it out.
Data corrections, each with a source:
- Synthetic spinel was showing natural spinel's refractive index.
- Opaque hematite was listed with facet doubling a loupe can see.
- 17 "0.000" dispersion values were placeholders published as measurements, and are now blank.
- Benitoite (heatable), synthetic spinel (quench-crackled) and hauyne (waxed) were wrongly labelled untreated.
- About 20 "untreated" labels now say exactly what their source supports.
- 13 simulant ranges now match the rows they name.
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
- 80.7 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
- Pro Monthly $19.99
- GemID Team Pro (Annual) $399.99
- GemID Team Pro (Monthly) $49.99
- Hobbyist Monthly $6.99
- Pro Annual $149.99
- Hobbyist Annual $49.99
- Copyright
- © 2026 Compton Consulting Incorporated