Gem Carat Weight Calculator v2.42
M.StevensAbout this app
Developer Description
The premium grade gemstone & mineral weight calculation tool
FEATURES:
✪ Accurately calculates gemstone carat weight, gram weight and tolerance value ranges.
✪ Contains 450+ gemstones and over 60 facet/cut types.
✪ Browsable A-Z list of crystals, gemstones and minerals, each with its own image and complete geological profile.
✪ Glossary of mineralogical terms and definitions.
✪ Reference charts.
✪ Directly compare gemstone profiles.
✪ Unit conversion tool.
✪ Full history of calculations for fast consults.
✪ Per calculation personal notes facility.
✪ Free lifetime updates - as we expand our database and add more content, it's all yours at no extra cost.
✪ Completely ad free, with no subscriptions or in-app payments to worry about.
◼️ Language is English only.
Our licensing policy can be found at www.markstevens.co.uk/licensing
We support our apps. If you run in to a problem, please drop us an email rather than a Play Store comment, and we can work with you directly to resolve the issue. Alternatively, visit our website at www.markstevens.co.uk where we have a support forum, articles and FAQ's.
What's New
- Floating point value support.
- API 36 and 16kb support.
- Updated appcompat, mat & sql libs.
- Min SDK 23.
Version Information
- Version
- 2.42
- Downloads
- 1K+
- Updated on
- Jan 10, 2026
- Released
- May 23, 2013
- Requires
- Android 6.0
Statistics
Google Play Rating History
Rating Distribution
Downloads Over Time
Gem Carat Weight Calculator has been downloaded times. Over the past 30 days, it averaged downloads per day.
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Gem Carat Weight Calculator users say on Google Play
great handy little tool
Would be 5 stars if the reference charts had specific gravity listed. When testing SG on gemstones to identify them it's difficult to search for the correct SG as you have to check each stones properties.
So far the best app for gemstones I've found. What I would like to see in gem data sheet is values and answers for double refraction, dispersion, pleochroism and fluorescence. Also a nice feature would be to know what mineral families different gems belong to, like quartz group. Comparison chart has a bug. Shows the same specific density for both gems as the lower one has. I've not tested the calculator yet but I'm impressed with the variety of faceting designs.