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As of 2019, GCM Industry and its affiliated companies have 5 advanced mining machine production bases and one production base under construction, with a total production area of 1,200,000 square meters, which can better meet more needs of global customers in the future.

 

Beginning in 1987, GCM industry has developed steadily and steadily in the field of mining machines, and has gradually formed a complete R&D, production, sales and service system.

Click the links below for detailed information about our areas of expertise and broad range of equipment offerings.

Electronic Gold Testers Review - YouTube

May 31, 2017· The review explains differences between electronic gold testers of different models and manufacturers. Presented are electronic gold testers from …

AuRACLE Model AGT-1 Electronic Gold Tester from GemOro!

AuRACLE Model AGT-1 Electronic Gold Tester is a good product. When I received the original one, there was a problem with it and the company immediately sent me out a new one with a shipping label to send the defective one back. Great customer service with a great product!

Shop | Diamond & Gold Testers- Diamond Testers

Presidium Multi Tester III (PMuT III) All-In-One Handheld Instrument for Testing Diamonds, Moissanites and Diamond Simulants by Presidium $209.00 $ 209 . 00 $257.49

: Digital Scale + Electronc Diamond Detector ...

Buy Digital Scale + Electronc Diamond Detector + Gold/Silver/Platinum Testing Kit + PRO Test Stone + Eye Loupe + 10pcs File Tool Set + Real Solid Silver/Plated Fake Gold: Shop top fashion brands Loupes at FREE DELIVERY and Returns possible on eligible purchases

Gold Testing Kit 10k 14k 18k 22k Silver Platinum - Sears

an eBay Marketplace seller. $44.95. EuroTool Gold Test Needles, 4 (10k, 14k, 18k, Silver) Sold by bestdiscountsforme an eBay Marketplace seller ... "gold testing kit 10k 14k 18k 22k silver platinum" & marketplace (2) Only. In-store: set your location. shop in. Refine …

Silver, Gold, and Diamonds. Oh My! Let's Test Some Jewelry ...

Mar 20, 2019· Testing items from my previous jewelry hauls for silver, gold, and diamonds. Links for testing materials: Ring sizer: https://

Gold and Silver Purity Testing Scanner with Bullion Wands ...

Many standard metals are stored in the Precious Metal Testing Scanner and can be selected by the user. For example, for gold coins the user can select pure gold, 22 K gold, 90% gold, or American eagle gold; for silver, pure silver, sterling silver, 90% silver. and Britannia silver.

Amazon Best Sellers: Best Jewelry Gold Testers

5 Gold Test Solution Needle Set 10K 12K 14K 18K 22K Karat Scrap Jewelry Melting Gold 3.0 out of 5 stars 2. $42.95 #42. 3pc JSP Gold Jewelry Testing Solutions 10K 14K Silver with Test Scratch Stone $12.94 #43. Kee Gold Tester 4.0 out of 5 stars 31 #44. Tri Electronics GT-Express Mini Digital Gold Tester Karat Testing Machine by Best Jewelry ...

Testing Silver with 14k nitric Acid - The eBay Community

But worth repeating. Anything you buy or sell as silver on ebay should be tested. 6,984 Views Message 1 of 8 0 Helpful 7 REPLIES 7. Highlighted. Re: Testing Silver with 14k nitric Acid ... So if I understand this post right can I also test my silver with the gold acids? 6,984 Views Message 4 of 8 0 Helpful Highlighted. Re: Testing Silver with ...

electronic gold tester products for sale | eBay

Get the best deals on electronic gold tester when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands | affordable prices.

Gold Testers for sale | eBay

Make offer - Gold testing acid (8 karats, 333 - 20 ml) - Gold test, gold tester 2 x 10ml 9ct Gold Tester Acid Spot On Testing Solution Test Kit Free Nitric HNO3 £10.99

How Do I Choose the Best Gold Tester? (with pictures)

Gold testing equipment is useful for valuing gold, although some gold testers have more features and better accuracy than others. You may prefer a testing kit over an electronic gold tester. Alternately, an electronic pen is small and lightweight to use, but may not offer all the features of a larger device.

Gold Testing Acid for sale | eBay

Get the best deals on Gold Testing Acid when you shop the largest online selection at eBay.com. Free shipping on many items ... Gold Testing Acid 10k 14k 18k 22k Platinum Solution for Jewelry Scratch Testing ... +$3.99 shipping. Make Offer - JSP GOLD JEWELRY TESTING ACID SOLUTION 18K TEST SCRAP 1/2 fl oz. BOTTLE. Acid Test Stone Gold Silver ...

Gold Testing Kit for sale | eBay

Get the best deals on Gold Testing Kit when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands ... Gold Test Acid 10k 14k 18k 22k Silver Platinum Testing Kit Stone Wooden. 4.8 out of 5 stars (60) ... GOLD TESTING KIT IN WOODEN BOX with 10K, 14K, 18K ACID WITH TEST STONE . $49.95.

How to use a gold test kit 10k 14k 18k 22k 24k ... - YouTube

Jul 20, 2012· Simple description on how to use a gold test kit. How To Test Gold and Silver Jewelry at Home With Acid Testing Kit - Real Gold Testing DIY Tutorial - Duration: 20:18. Texas Gal …

: gold test kit

PuriTEST Gold and Silver Test Kit + Platinum Jewelry Testing Solution + Pro Touch Tester Stone + 5gram .999 Gold Clad Sample + 5grain Solid Silver Bullion Bar 4.6 out of 5 stars 27 PuriTest 10K, 14K, 18K, 22K Gold, Silver, and Platinum Acid Kit with Scratch Stones and Files

Testing Gold With Acid Questions File Test & Stone Test - eBay

I have a piece of gold that's marked 22k .The item is scrap due to damage so i did a REALLY deep file/cut test and put a drop of 22k acid into the cut .The acid bubble a tiny bit and did not turn green .I left it on for over 2 minutes to be sure.I tested this way several different times in different...

Gold Tester for sale | eBay

1 product rating 1 product ratings - Gold Silver Test Kit Diamond Tester Precious Metal Testing Kit Digital Set $21.58 Trending at $23.86 eBay determines this price through a machine learned model of the product's sale prices within the last 90 days.

XRF Gold Tester: XRay Gold Tester for XRF Gold Testing ...

Bruker's XRF Gold Tester Gun: Precision, Speed, Ease Scan Gold Accurately to 0.01% in 2 Seconds per Item! With the high price and volatility of gold, you cannot afford the possible inaccuracies and time of traditional testing methods to verify the value of items being sold, bought, and recycled.

Gold that is marked, tests as gold, BUT sticks to ... - eBay

Slightly.. It won't effervesce or turn a bright green color like it would when applying the solution to a non-gold metal like brass or copper, but if you wipe out the (10k gold) area tested with a white tissue paper, you will most likely see some green colored residue on the tissue. That's because 10 karat gold has a fineness of only 41.7% (less than 1/2 pure gold) combined with 58.3% alloy(s).

How do you tell if gold acid test bottles are gett ... - eBay

I noticed that my 14K acid is smoking a bit as I drop a bead onto my stone, and smoking a bit once on the stone. It's also removing a small bit of the 14K gold, as if it were a bit too strong now. I've tested it with stamped 14K items, so I know they are indeed 14K. Does this mean the acid is no ...

How to Best Use Gold Test Kits | Sciencing

Gold testing kits are used to test the purity of the gold and the 'Karat'. Testing kits can either come in the form of acid testing -- the most popular form -- that can identify the Karat and purity of the gold through acid reactions, electronic testing kits and touchstone testing kits that compare the reaction of real gold to other forms of gold you may have.

3 Ways to Test Gold at Home - wikiHow

Mar 25, 2020· To test gold at home, check your gold for a hallmark, with "GF" or "HGP" meaning its gold plated, while "24K" or another number means its real gold. Alternatively, find out if your item is gold plated by holding the piece under a light to see if it's fading at the edges.

Jewelry Golds&Silver Testing Kits Tools for sale | eBay

Get the best deals on Jewelry Golds&Silver Testing Kits Tools when you shop the largest online selection at eBay.com. Free shipping on many items | Browse your favorite brands ... 6 GOLD TESTING KIT Acid Jewelry Tester & Scratch Test Stone 10k14k18k22k Silver. $15.99. 4 sold. 7 PC FRESH Gold Silver 925 Platinum Testing Acid &Scratch Stone ...

Gold Test Kits | Silver Test kits | Diamond Test Kits ...

Each 0.5 Ounce Bottle contains enough acid for hundreds of tests! Includes 6 bottles: 1 x Single Bottle of 10k Gold Testing Solution, 1 x Single Bottle of 14k Gold Testing Solution, 1 x Single Bottle of 18k Gold Testing Solution, and 1 x Single Bottle of 22k Gold Testing Solution. We sell over 2000 bottles of acid a day through Ebay and Amazon!

: Acid Test Kit Gold 10K 14K 18K 22K Silver ...

6 Gold Testing Acid Kit Jewelry Tester 2" x 1.5" Scratch Test Stone 10k 14k 18k 22k Silver 4.1 out of 5 stars 15 $18.95 $ 18 . 95 JSP Gold, Silver, and Platinum Testing Acid Solutions Kit With Test …

5 Proven Bullion Methods to Test Gold & Silver at Home

Test 5: Silver & Gold Acid Test. Investors can purchase inexpensive acid test kits for gold and silver. Watching the color change in a drop of acid can reveal whether or not a sample is genuine. However, acids should be handled carefully. Your items can be permanently discolored.

XRF products for sale | eBay

Identify Your Sample With an XRF Analyzer. A handheld XRF analyzer is a convenient way to determine the elemental composition of a sample. Whether youre checking the contents of scrap metal or identifying an unknown material in a lab, the right XRF gun will make your job significantly easier. Youll find plenty of new and used XRF analyzers on eBay.