---
product_id: 1144855
title: "GEM20-20g x 0.001 Grams, High Precision Digital Milligram Jewelry Scale, Reloading, Jewelry and Gems Scale, Calibration Weights and Tweezers Included"
brand: "smart weigh"
price: "¥11008"
currency: JPY
in_stock: true
category: "Smart Weigh"
url: https://www.desertcart.jp/products/1144855-gem20-20g-x-0-001-grams-high-precision-digital-milligram
store_origin: JP
region: Japan
---

# Battery status indicator for uninterrupted use 0.001g ultra-precise accuracy Flip cover protects sensitive sensors GEM20-20g x 0.001 Grams, High Precision Digital Milligram Jewelry Scale, Reloading, Jewelry and Gems Scale, Calibration Weights and Tweezers Included

**Brand:** smart weigh
**Price:** ¥11008
**Availability:** ✅ In Stock

## Summary

> ⚖️ Precision that professionals trust — weigh your world with confidence!

## Quick Answers

- **What is this?** GEM20-20g x 0.001 Grams, High Precision Digital Milligram Jewelry Scale, Reloading, Jewelry and Gems Scale, Calibration Weights and Tweezers Included by smart weigh
- **How much does it cost?** ¥11008 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/1144855-gem20-20g-x-0-001-grams-high-precision-digital-milligram)

## Best For

- smart weigh enthusiasts

## Why This Product

- Trusted smart weigh brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Portable & Protected:** Compact design with a flip cover ensures your scale stays safe on the go.
- • **Calibrated Confidence:** Includes calibration weights and tweezers for guaranteed accuracy every time.
- • **Multi-Mode Versatility:** Switch effortlessly between grams, ounces, carats, and more to fit every professional need.
- • **Smart Power Management:** Stay powered with included AAA batteries and a clear battery life indicator.
- • **Laboratory-Grade Precision:** Measure down to 0.001 grams for flawless accuracy on gold, gems, and powders.

## Overview

The Smart Weigh GEM20 is a high-precision digital milligram scale offering 0.001g accuracy, ideal for jewelry, gemstones, pharmaceuticals, and reloading. Featuring multiple measurement modes, built-in calibration weights, a protective flip cover, and a battery status indicator, it combines laboratory-grade reliability with portable convenience. Backed by a 2-year warranty, it’s engineered for professionals who demand exactness in every measurement.

## Description

desertcart.com: Smart Weigh GEM20-20g x 0.001 Grams, High Precision Digital Milligram Jewelry Scale, Reloading, Jewelry and Gems Scale, Calibration Weights and Tweezers Included : Industrial & Scientific

## Features

- Professional Precision for High-Value Items: This milligram scale delivers $0.001g$ accuracy, making it perfect for weighing gold, gemstones, and fine jewelry with laboratory-grade reliability.
- Clear Battery Specs & Power Efficiency: Powered by 2 AAA batteries (included). The easy-to-read LCD features a dedicated battery status icon to alert you when power is low, ensuring your measurements never lose accuracy due to weak voltage.
- Reliable for Medicine & Lab Use: Its high-sensitivity sensor is ideal for precisely measuring pharmaceutical powders and chemical supplements. Features an Auto-Off function to preserve battery life for long-term portable use.
- Built-in Calibration for Lasting Accuracy: The kit includes two 10g calibration weight. We recommend calibrating upon first use and after battery changes to ensure your gold and medicine measurements remain perfectly precise.
- Versatile Measurement Modes: Easily switch between g, oz, ct, ozt, dwt, and gn at the touch of a button to accommodate all weighing needs, from reloading and lab work to jewelry and gemstones.
- Portable Protective Design: Features a built-in flip cover to shield sensitive sensors and the weighing platform during travel. Compact, durable, and engineered for high-precision laboratory use anywhere.
- Peace of Mind 2-Year Warranty: We stand behind our quality. Your purchase is protected by a comprehensive 2-year warranty and dedicated support for a reliable, professional weighing experience.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00ESHDGOI |
| Best Sellers Rank | #7,468 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #491 in Test, Measure & Inspect |
| Brand Name | Smart Weigh |
| Color | Silver |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,668) |
| Display Type | LCD |
| EU Spare Part Availability Duration | 60 Days |
| Form Factor | Mini |
| Global Trade Identification Number | 00700358199127 |
| Included Components | Calibration Weights |
| Item Weight | 4.25 Ounces |
| Manufacturer | Smart Weigh |
| Material Type | Stainless Steel |
| Measurement Type | grams |
| Model | GEM20 |
| Part Number | GEM20 |
| Readout Accuracy | Example: 0.001 Grams |
| Recommended Uses For Product | weighing jewelry, weighing gemstones, weighing medicine, reloading, laboratory use, weighing gold, weighing pharmaceutical powders, weighing chemical supplements |
| Special Features | high precision 0.001g accuracy, built-in calibration weights, multiple measurement modes, flip cover protection, tare function, portable design, LCD display |
| UPC | 885305222797 885697786334 885474837464 700358199127 621011632778 723120986596 735343133787 798256080227 |
| Unit Count | 1.0 Count |
| Warranty Description | 2 year warranty |
| Weigh Scale Type | Counter Scale |
| Weight Capacity Maximum | 20 Grams |

## Product Details

- **Brand:** Smart Weigh
- **Color:** Silver
- **Display Type:** LCD

## Images

![GEM20-20g x 0.001 Grams, High Precision Digital Milligram Jewelry Scale, Reloading, Jewelry and Gems Scale, Calibration Weights and Tweezers Included - Image 1](https://m.media-amazon.com/images/I/61WcWdEboyL.jpg)

## Questions & Answers

**Q: does it weigh in mg**
A: No this scale doesn't even register until you get up to 5mg, I have placed many an item below that weight on this alleged +/- .005 error rate scale, and frankly I wonder how the hell is it legal to advertise something as measuring a unit it literally has no chance of measuring. People say to place a 10g weight and then weigh the amount that is too light, but that doesn't work as far as I see for things still below 5mg, so if this thing can't detect a difference of 5mg from 0 to 5 or from 1gram to 1.005... why is it called a scale accurate to .001, sure it displays that, but thats pretty much a guess I can now see... its sad that basically to get a better scale, and not by much you need to spend 200$, and even then you won't be able to measure 1mg, just do better than this piece of junk, which I own and love, but I am annoyed at its misrepresentation of the facts, I guess fraudulent advertisement is now considered marketing huh, how the other guy can in good concience tell you this thing weight very well, i dunno, I mean its the best 20$ scale you can get, but no where near good enough for anything other than .01g measurements really, since scales need to have a 10x accuracy factor if they are worth their salt in order to round up or down to what it shows on the screen. In other words it needs to be more accurate than it displays, nearly alll .1scales are at least accurate to .05, unless their chinese garbage. But somehow this precision scale goes in the opposite direction, and alleges to display values I have no idea how it determines when it literally doesn't have the accuracy to... must be some hella funky coding for a scale that in its own manual states an error rate of plus o minus 5mg but still allege to tell you the exact mg as if that figure have a better than 1 in 10 chance of being right. Sorry the scale isn't bad for the money, I just wish they made one that actually did this, and was affordable to the public.

**Q: Has anyone used this for weighing powder for reloading ammunition? Would you recommend it?**
A: As long as you use check weights or calibrating weights (same thing just different terminology) to calibrate the scale you don’t have to worry about a thing since this one is the most accurate ones I could find other than the gempro 250 which is a $200 scale but I’d still use this one for reloading as long as I have check weights which I’ll always have.

**Q: Can it weigh in milligram precision in very small incrimental measures w/o auto-taring? A problem w/ many scales is to auto-tare tiny weight changes.**
A: Amanda:
I suggest that at 1 mg. precision, the surface the scale sits on, and the degree of level are very important.   The heavier, denser, and more solid the base is, the better the accuracy.   Vibrations also are very important.   Setting the scale on a kitchen counter top (not heavy, dense, and stable) with a refrigerator running anywhere close (say, within 10 or 20 feet) will throw off the accuracy -- probably by a few milligrams, easily.   Something heavy enough to provide a very stable base will be quite difficult to level.  While I'm not sure exactly the level of precision required, it would not surprise me if it needs to be 1 mm/meter, which would be difficult to achieve without a precision leveling device.
I can't tell you that the scale is as precise as advertised, but I do think it would be difficult to find a base in the average home that would allow you to make such a precise measurement.
All that said, I haven't shopped for a scale base that might be made for the purpose - though buying one that would be heavy enough would make it significantly more expensive than the amount you paid for the scale.

**Q: Can I weight diamonds, ruby and gold?**
A: You can anything that has more than or equal to .001 which is a miligram, very small measurement but as long as you have calibrated it right and not damaged the plate and use a level surface, you will have very accurate weight. Always remember conversion, 1mg is .001 and 100mg is .100 on this type and a solid gram is always 1000mg no matter what, different things have different densities so just because one looks more than another or less dont think its broke, unless of course the same material is weighing different . Hope this helped.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-07-07*