# Gemology Notes — Gemology data & tools

> Offline gemology reference with 3D crystal models and detailed gemstone data. (iPhone/iPad app by 际 郭.)

- Source: https://appshunter.io/ios/app/gemology-notes/id6797660418 (this page in markdown: same URL + `.md`)
- Developer: [际 郭](https://appshunter.io/developer/6797282134)
- Category: Education, Reference
- Price: Free (on sale, was $2.99)
- Age rating: 4+
- Requires: iOS 17.0 · 30 MB
- Languages: Chinese (Simplified, China), American English
- Released: 2026-08-18
- Data updated: 2026-09-25
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/gemology-notes/id6797660418/reviews.md

## What is Gemology Notes?

Systematic Gemology Notes

An offline reference app dedicated to gemology learning, covering the fundamental properties, crystal structures, and systematic classification of common gemstones.

KEY FEATURES

• Gemstone Browser — Reference material organized by crystal system and gemstone species
• 3D Crystal Models — Interactive displays of each gemstone's crystal structure; rotate and zoom to examine every angle
• Detailed Notes — Systematic knowledge covering physical properties, optical characteristics, and key identification points
• Fully Offline — No internet connection required; study anywhere, anytime

Ideal for gemology students, professional gemologists and appraisers, jewelers, and collectors.

## Key features

- Gemstone Browser
- 3D Crystal Models
- Detailed Gemstone Notes
- Offline Access
- Systematic Classification

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/gemology-notes/id6797660418/reviews.md

### 5/5 — 特别伟大的一个APP！

*2026-09-18*

当年备考FGA如果有它就不用每天背着重重的书包挤地铁૮₍ɵ̷﹏ɵ̷̥̥᷅₎ა

### 5/5 — 特别好用

*2026-09-04*

用这个App来学习确实很方便。3D晶体模型可以旋转查看，晶形和结构比书本上的平面图直观很多，各类宝石的光学参数、鉴定要点也都整理得清楚，还能离线使用，平时在实验室或者通勤路上随手翻一翻就能巩固知识点，不用总带着厚重的教材，是个很贴心的学习工具。

膜拜大佬推出这么实用的工具！！！

### 5/5 — 🎉

*2026-08-26*

小红书来的，赞，有些代码块没加载直接显示代码了，另外求加个名词解释，期待更新

**Developer response:** 感谢支持，会持续优化的

### 4/5 — 教科书

*2026-08-23*

学术呈现，要是能有更多实体图片就更好了。

### 5/5 — 膜拜大佬

*2026-08-21*

好厉害，再也不用翻书来回麻烦了！

### 5/5 — 强推！珠宝首饰专业必备

*2026-08-21*

珠宝首饰专业学生或者说感兴趣的爱好者都强推，有3d模型，信源基本上都是全球的顶刊，来源丰富且牛

### 5/5 — 👍

*2026-08-21*

当年读书的时候有你就好了🥹虽然还没细看，粗略浏览一下感觉对于刚接触这个专业的学弟学妹们会有很大帮助，辛苦了

### 5/5 — 让更多人看到

*2026-08-18*

加油

### 5/5 — 强烈推荐！

*2026-08-18*

研发者真的好棒，内容好全面，基本都覆盖了系宝的内容，日常工作学习生活中要用到系宝的地方还是挺多的，强推强推👍

## Frequently asked questions about Gemology Notes

### What is Gemology Notes?

Gemology Notes is an offline reference app designed for learning about gemology. It provides detailed information on gemstone properties, crystal structures, and systematic classification, complete with interactive 3D models.

### Can I use Gemology Notes offline?

Yes, Gemology Notes is fully offline. You do not need an internet connection to access its reference material, 3D crystal models, or detailed notes, allowing you to study anywhere.

### What kind of gemstone information does Gemology Notes offer?

Gemology Notes offers systematic knowledge covering fundamental properties, crystal structures, and the systematic classification of common gemstones. It includes physical properties, optical characteristics, and key identification points.

### Does Gemology Notes have interactive 3D crystal models?

Yes, Gemology Notes features interactive 3D crystal models for each gemstone. You can rotate and zoom these models to examine their crystal structures from every angle.

### What is the price of Gemology Notes?

Gemology Notes is a paid application, available for a one-time purchase of $2.99.

### What devices is Gemology Notes compatible with?

Gemology Notes is compatible with iPhones and iPads.

### How often is Gemology Notes updated?

The latest version of Gemology Notes is 2.1.0, which was last updated on August 29, 2026. Updates typically include new features, bug fixes, and content improvements.

### What is the age rating for Gemology Notes?

Gemology Notes has an age rating of 4+, making it suitable for a wide range of users interested in learning about gemology.

## Version history (last 5 releases)

### 2.3.2 — 2026-09-24

What's New in 2.3.2
• New "Polariscope Lab": a polariscope simulation alongside the Optics Lab, built on physically based polarized-light ray tracing — showing birefringence, extinction and interference as plane-polarized light passes through a gemstone, in real time.
• Three independent polarizers: rotate the lower polar (polarizer) and the upper polar (analyzer) independently from 0–180°, and insert a third mid polarizer. Placing a 45° mid polar between crossed polars turns the dark field bright — the classic three-polarizer experiment, fully reproduced.
• Conoscopic interference figures: two viewing modes, ideal (analytic) and true ray-traced. Observe the uniaxial black cross with concentric isochromes, the bull's-eye figure of quartz, and the biaxial hyperbolic brushes with both optic-axis emergence points, using constants measured from the system notes.
• Rotating stage and optic-axis orientation: rotate the stage a full 360° to watch the figure evolve; tilt the optic axis off the stage normal to simulate searching for the interference figure under the microscope. For biaxial stones, orientation is described by the optic bisectrix (the acute bisectrix, Bxa).
• Free inspection: white D65 daylight for interference colors and pleochroism, or the sodium D line for clean isochromes; set crossed, parallel or any angle, with a Malus's-law transmission readout.
• Note: the simulation is for teaching and comparative observation; it does not constitute a gemological identification.

### 2.3.1 — 2026-09-20

Optical Lab — New Real Spectral Light Sources (Observe Color-Change Effect)​

Integrated 31-bin (400–700 nm / 10 nm) relative spectral power distributions (RSPDs) for 4 standard illuminants:
D65 (CIE 015:2004 average daylight, 6504 K)
A (Planck 2856 K tungsten-filament incandescent lamp)
Candlelight (1900 K blackbody approximation; gemological convention candle-flame color temperature)
E (equal-energy white reference)
All 61 varieties in the Optical Lab are rendered based on their true absorption band positions.

### 2.3.0 — 2026-09-17

What's New in 2.3.0

• New "Optics Lab": a physically based path-tracing gemstone simulator that renders how light refracts, undergoes total internal reflection, disperses and is absorbed across the facets — making brilliance and fire directly visible.

• Cut library: over 250 cut designs across 27 shape groups. Search by cut or designer, and filter by shape, facet count, tiers, index gear, and length-to-width / height-to-width ratios; open any cut in the Optics Lab to compare how different cuts behave optically.

• Materials from your notes: pick a species and color grade straight from your gemstone notes. Simulate using the standard representative color, the body color from your note, its spectrum or the top color — so what you see is the gem you actually own.

• Free inspection: drag to rotate, pinch to zoom and double-tap to reset. Switch between perspective, top, bottom, front and side views; adjust the lighting environment, background, exposure, light azimuth and ray-bounce count, and mark the critical angle.

• Note: the simulation compares the optical appearance of different cuts and materials; it does not represent actual cutting yield or material grade.

### 2.2.0 — 2026-09-14

What's New in 2.2.0
• New color themes: 8 macaron palettes — Classic Gold, Mint, Matcha, Peach, Lemon, Taro, Sky and Coral. Each works independently in light and dark mode, and can be changed anytime in Settings.
• Search bar at the top of the menu: find any note by Chinese name, English name, pinyin or pinyin initials. Title matches appear instantly, while full-text matches are listed separately with a snippet preview.
• Minor reading and interface refinements.

### 2.1.0 — 2026-08-29

What's New in 2.1.0

• New identify tool: enter refractive index, birefringence, specific gravity, pleochroism, absorption spectra and other observations to narrow down candidates from 49 common gemstones. 
• Key physical properties re-verified against standard references. 
• Synthetic diamond and imitation identification added to the diamond note. 
• Improved reading smoothness and stability.

## More apps by 际 郭

- [PuffComic](https://appshunter.io/ios/app/puffcomic/id6800779811)
- [ModelLens](https://appshunter.io/ios/app/modellens/id6805873122)
- [FossilNotes](https://appshunter.io/ios/app/fossilnotes/id6807045981)
- [Quantum Mechanics Notes](https://appshunter.io/ios/app/quantum-mechanics-notes/id6808079339)
- [QM Simulator: Quantum Physics](https://appshunter.io/ios/app/qm-simulator-quantum-physics/id6809480339)

All apps by 际 郭: https://appshunter.io/developer/6797282134

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-25.*