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Universal Specific Gravity Kit for Your Electronic Carat Scale

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$127.00

$ 56 .99 $56.99

In Stock

About this item

  • This "Electronic Scale" method/device is the best overall for Specific Gravity measurement. It is very accurate, providing that the Scale you use it with is sensitive enough, while the measuring process is quick and easy, overall.
  • As seen on YouTube, just weigh your sample in "Air" (which is the same as weighing it on the platform of your Scale), and then weigh the sample in "Water." Then calculate SG by dividing the difference between the heavier Weight in Air and the lighter Weight in Water, into the Weight in Air. A simple Worksheet is provided for that purpose.
  • Kit contains 3-way adjustable Beaker assembly, Weighing Pan assembly, Aluminum Stick reference weight (SG=2.70), Tweezers, Illustrated Instructions, Worksheets, and Table of Gems sorted by Specific Gravity.
  • Your Scale must have minimum capacity of 50 carats, protruding Weighing Platform at least 1.5" across, openable or removable draft shield/lid for access from front and 1 side, and Tare function to Zero out Scale. This kit uses a 50mL Beaker as a water container, with approximately a 1.6" inside diameter. The "tared weight" of that portion of the kit that sits on the weighing platform is 40 carats
  • SG accuracy depends on Readability or Minimum Weight spec of the scale you use with the SG Kit. Rule of thumb is Readability x factor of 50, so a Scale with Readability of .01ct will give accurate SG on items weighing down to .5ct (.01 x 50).


Use this kit with _your_ Electronic Carat Scale to measure the Specific Gravity of Gems and other small items. Please note that the Kit does not include the Scale, but this SG kit is "Universal" in that it is compatible with most any compact digital Carat scale. It is adjustable in 3 different dimensions for Scales of varying height, depth, and width. The Kit includes everything you need to measure Specific Gravity, except for the Scale and the Water. Note: There are two versions/sizes of this kit. Choose our "Bench Scale" version of the kit, instead, for use with larger, standard size Lab or Industrial scales (search SGK-B).


RB in Hawaii
Reviewed in the United States on January 16, 2023
The water-weight suspension frame is poorly made. The foot/bottom points slide freely allowing the entire frame to cant at odd angles. Should have been squared and secured to base to prevent canting/leaning when weighing.
cozybldr
Reviewed in the United States on April 18, 2022
Everything that was advertised was there. In examining the spreadsheet, the print is extremely small. It needs to be a larger font or show a link to an electronic version for download so I can print it at the larger font.
DANILO
Reviewed in the United States on April 27, 2019
This kit is too little and have defective.
Dan
Reviewed in the United States on August 19, 2018
Makes measuring SG of gemstones, rough, easy peasy.
Customer
Reviewed in the United States on March 4, 2018
Very good product and very useful very happy
Derian
Reviewed in the United States on December 23, 2015
It works well with my carat scale and is very useful. SG readings look pretty accurate, and between this and a refractometer, I can make an accurate gem species determination 90% of the time. However I question the value for the dollar amount - nearly $100 for something that was obviously manufactured for considerably less. Also somewhat concerned as it is a bit fragile -- not a tool I can leave out, but needs to be put away each time to keep it safe.
YourGemologist
Reviewed in the United States on November 3, 2015
Excellent hydrostatic tool for gemologists and anyone interested in getting specific gravity of gemstones. Very nice quality, very accurate with 2 or 3 different types of scales we used to test, and this unit is very well priced. I highly recommend both the Universal Specific Gravity Kit and the seller for quality.Robert James FGA, GGInternational School of Gemology
J Lee Arnold
Reviewed in the United States on November 10, 2015
While it seems flimsy - it is notGets the job done and easy to use once setup