Specific Gravity Kit (large) for testing gold, silver, platinum etc

Specific Gravity (density) kit. Large, for testing gold, silver, platinum

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(Single item price excluding VAT: £107.50)

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Free gift option with this item

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Pickup available from Quicktest (WD18 8JA)
Email us or call on 01923-220206 for appointment.


Weigh the item on a very sensitive weighing machine (down to 0.001g is recommended).

Then weigh it again, but this time suspended in water - that's what the specific gravity kit is for.

Now find a calculator and do a simple calculation.

As with all methods of testing, it has its limitations. The advantage is that you can test very valuable items such as rare coins which must not be marked in any way.


YOU WILL NEED ONE THAT WEIGHS DOWN TO 0.001g. (recommended: CT-250)



Will the attachment fit the scale?

The height from the top of the base to the circle that holds the beaker is 165mm. You can make it as lower, but not higher.

You will also need to slide the base underneath the scale. Ideally, this will require a gap under the scale. The base is 3mm thick.

Alternatively, if the scale is very small, it can stand on top of the base. The base measures 130mm X 80mm

The distance from the upright (pole) to the middle of the flask (which should line up with the middle of the weighing platform) is 130mm

You can use a scale requiring a shorter distance but not a longer distance.

What is the largest-size item that can be tested?

The diameter of the platform on which you place the sample is 25mm and the beaker gives you a height of about 45mm.

In practice, an item this tall and thin would fall off the platform; in practise, the largest size would be the equivalent of a stack of 4 or 5 one-pound coins.

Too small? There are dedicated balances (densimeters) instead of an ‘attachment’, prices are usually about £2000.00 to £3000.00 but see our special clearance prices..



See an illustrated guide: click here.





Free gift details

If you would like one of the following free gifts with this product, select one from “Select your free gift” above.

10X21 loupe, boxed (RRP £4.50 )

Stand Magnifier, 10X30 (10X mag / 30mm lens dia.) (RRP £3.50 )

Phone microscope, fits any phone, 55X (RRP £6.50 )


Ask a Question
  • Can the CT-250 scales be used with the large Specific Gravity kit and does the SG Kit come with any calibration sample

    Yes the scale can be used with the kit.

    The scale comes with a calibration sample (weight).

    The SG kit does not use a calibration sample, the “sample” is water, so providing you are using pure water (distilled is best but not essential) it will work.