GEMMOLOGICAL INSTRUMENTS
TIP: if the metal is magnetic or if, when you file the item, you can feel that the metal is hard (as hard as the steel file) - it cannot possibly be gold or silver or platinum, there is no need to use acid. (But being magnetic does not mean it’s steel, some steel is not magnetic).
• Clear (high-zinc 9ct) Bottle: Clear Fluid or Base Fluid. Appearance: the bottle is labelled CLEAR FLUID (8- 9ct), the top of the bottle cap has a brown dot, the fluid is clear. Purpose: to distinguish a particular 9ct alloy that contains a high level of zinc from ‘standard’ 9ct, and at the same time to give an indication of very low-grade gold such as 8ct.
TIP: this is not an easy fluid to use and should not be used in place of the standard 9ct bottle. Also, since the high-zinc alloy is quite recent, all items should be hallmarked, so test the hallmark link, check that the
remainder of the item has the same reaction. Code
Description
T1697 T1695 T1696
T1698 T1694 T1699
White - 9ct Gold Testing and Non Gold Refill Bottle
Amber - Silver Testing Refill Bottle
Blue - 14ct to 24ct Gold Testing Refill Bottle
Green - White 18ct Gold & Platinum Testing Refill Bottle
Clear - 8ct to 9ct & High Zinc 9ct Testing Refill Bottle
Testing Paper, Troytest/Quicktest Refills
UOM Price
EACH EACH EACH
EACH
£8.70 £8.70 £8.70
£8.70 EACH £10.95 EACH £1.75 Precious Metal Testing, Mizar M-24
• The most efficient aid you will need to test gold • Use with our gold test solutions to determine objects gold content
• Also useful for ensuring your acid gives the results it should (it has’t deteriorated in any way)
• Bergeon Swiss has 4 points for yellow gold 9,14, 18 & 22 carat, 3 points for red gold 9, 14 & 18 carat & 1 point for white gold
• Indian star has 5 points for yellow gold 10, 14, 18, 21 & 22 carat & 1 point for silver
Using the Touchstone and Test Star
1. Select the pointer you think the item you are testing matches (i.e. if you think it is a 9ct piece, compare it to the 9ct pointer)
2. This 9ct gold test pointer resembles a 9ct gold piece (meaning it is similar in colour and has a similar effect on the touchstone)
3. Scratch the pointer over the touchstone (don’t scratch it with excessive force)
4. Now pick up the gold piece you want to test and scratch a part of it over the touchstone, right next to the scratch you made with the test pointer
5. Test both scratches with acid at the same time and watch the results. If they react in the same way, you know you have determined the carat of gold you were testing!
6. Refer to testing solution instruction for fluid reaction times and colours
Code T1689 T51478 Mizar M-24 Precious Metal Tester
• Tests gold from 9 to 24 carat ie. 9ct, 10ct, 12ct, 16ct, 20ct 22ct and 24ct.
• Distinguishes gold flash and gold plate from solid gold.
• Tests all colour gold alloys. • Non-destructive testing. • Determines platinum. • Shuts off automatically which in turn increases battery life.
• Tests in as little as 2 seconds. • Acid Oxidizer Refill (T9245A)
Kit contains: • Mizar M24 tester • Acid oxidizer refill • Eraser
• Eraser pencil Code
T9245
T9245A T9244A
Description
Mizar M-24 Precious Metal Tester Mizar M-24 Refill Mizar ET-18 Refill
UOM Price EACH £139.95
EACH £24.50 EACH £21.60
Gold Testing - Precious Metal Testing Stones
When testing for gold, always suspect that the item could be plated.
Rub the stone over the piece to remove any plate on the item.
Apply the acid as required on the touch stone to test.
Applying testing acid directly on to the metal will discolour the item, therefore if a piece is returned to the customer there will be no acid spoil inflicted on to the metal.
(Stone size may vary)
Other Uses: • After sharpening your gravers on a sharpening stone use a “Touch Stone” to achieve a mirror finish, a better way than using conventional abrasive paper that could rip.
Description
Gold Testing Plate (Star Wheel), Bergeon 30504
Gold Testing Plate (Star Wheel), Indian
Testing Stones UOM Price EACH £159.95 EACH £49.95 Please note:
Gemmological instruments tools are designed to save you time and effort. It is your responsibility to understand what the Gemmological instruments response signifies. Our range is practically more useful in telling you what a stone is NOT, then what it is. And can be helpful in narrowing down possible identifications. With experience you will know when to seek help from a professional gemmologist lab.
Chelsea Filter Testing Plate (Star Wheel)
The gold test star is a gauge to determine the carat of unknown, unmarked gold items, by colour reference and by comparing acid test/touchstone reaction results.
Testing Stars
• Use oil to obtain best results. Code
Description
T20860 S39265 S34924
68 x 38 x 12mm Testing Stone
150 x 50 x 12mm Testing Stone - In Wooden Box
150 x 75 x 15mm Testing Stone
UOM Price EACH EACH EACH
£2.25 £9.95 £9.95
GEMMOLOGICAL INSTRUMENTS
Gemological Instruments
Become a Gemstone Dealer, plus enjoy learning with our selection of tools for gemstone identification, whether you’re buying or selling, or simply have an interest in to the world of Gemstones. The key to avoiding costly mistakes and recognizing profitable opportunities, is to know what to look out for with a hands on approach.
Our range for Gem Identification Tools equipment and books will help you: • Open your eyes to the types of treatments, imitations, synthetics, look-alikes and fakes in the gem market today.
• Learn how to tell the difference between them.
Quickly spot: • Synthetics, including emeralds and diamonds • Filed diamonds • Diffused “blue” sapphires and “red” rubies • High pressure/high temperature (H P H T) – treated diamonds
• Discover how to identify new gems such as “mandarin” garnet red “emerald”, and North Carolina’s chromium-rich emeralds
• Know when to seek help from a professional gemmologist or lab
• Become more professional in your business or hobby
Assists stone sorting and gem identification. Includes instructions and guide notes.
The Chelsea Filter (emerald filter) is a pocket-sized colour filter.
It is used primarily to spot fakes mixed in with natural stones in coloured stone parcels and jewellery, and to differentiate emeralds, sapphires, aquamarines and
natural green jadeite from manufactured stones. 796 COUSINS TRADE SUPPLIER
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