XinHai Mining

Product Introduction

    • Don39;t buy gold in Assay cards! - YouTube

      Aug 10, 2014 · These assay cards are absolutely perfect for counterfeiters! It39;s easy to sell a fake bar that cannot be inspected/tested before purchasing. BE CAREFUL! It39;s your money! Its time to cut open those

      AlmostCirculated 23.7KInquire Now
    • Assay amp; Certificate of Authenticity (COA) Defined

      An assay is an analysis designed to measure and test the composition in ore, alloys, and precious metals. With respect to precious metals, specifically silver and gold, it is a way to make sure that all the coins or bars produced in a mint meet the correct purity standards and content.

      Inquire Now
    • Assaying Gold and Silver Ores: Fire Assaying and Other

      Using the known original weight of sample that was used in the assay, the weight of the gold in the weight of the silver, the content of the ore sample in ounces per ton (or other units) can be calculated. Although fire assay processes have been around for many centuries, they are still somewhat of a mystery to many miners.

      Inquire Now
    • ASSAYER Gold and Silver mining - Home

      Gold and silver fire assays. 5 to 7 working days turnaround time is typical. Fast, affordable, accurate numbers. 30 years experience. Hard rock, black sands, cons, native, sulfides, tellurides. 35 Au + Ag assay, 30 Au only. 10 prep per sample (jaw, dry, split, pulverize) if your

      Inquire Now
    • Buying gold with assay. Worth it? - Precious Metals Forum

      I39;m going to start buying more gold to go with my silver. Is it worth buying gold in the tamper-proof packages with the certified assay? Does an assay add any value? That39;s the idea behind it, I suppose, but in reality I suspect it doesn39;t really make much difference to the value of the metal.

      Inquire Now
    • 1 Gram Istanbul Refinery Gold In Assay: Amazon.com

      CA 1 Gram Gold Canadian Maple Leaf (Maplegram25) In Assay 50 Cents Brilliant Uncirculated

      Inquire Now
    • Gold Assaying and Gold Grades - Investing News Network

      Gold assaying is essential in determining the amount of gold in a mineral deposit. The process involves bringing a rock sample, most often a core obtained through drilling, to a laboratory where it is examined by experts. Assay results are often mapped and used to pinpoint targets for future drill programs.

      Inquire Now
    • Valcambi Suisse 1 Oz Gold Bar in Assay .9999 Fine Under Spot

      Find many great new amp; used options and get the best deals for Valcambi Suisse 1 Oz Gold Bar in Assay .9999 Fine Under Spot Must Sell Quick at the best online prices at eBay! Free shipping for many products!

      Inquire Now
    • 1 oz Britannia Gold Bar (In Assay) | Bullion Exchanges

      Being a standard 1 oz gold bar, it contains 1 ounce of .9999 fine gold and will be individually packaged with an assay card. With the introduction of this bar, The Royal Mint gave more opportunity for their customers to diversify their portfolio and add some extra beauty to their collection.

      Inquire Now
    • Gold Assaying Methods - Mineral Processing amp; Metallurgy

      To determine the amount of gold metal in ore, there are two kinds of gold assay adopted: The dry assaying method (i.e. by fusing the powdered ore with or without fluxes). The wet assaying method (i.e. by the agency of liquids).

      Inquire Now
    • ASSAYER Gold and Silver mining - Home

      Gold and silver fire assays. 5 to 7 working days turnaround time is typical. Fast, affordable, accurate numbers. 30 years experience. Hard rock, black sands, cons, native, sulfides, tellurides. 35 Au + Ag assay, 30 Au only. 10 prep per sample (jaw, dry, split, pulverize) if your

      Inquire Now
    • Gold mining assayers amp; assaying companies

      Absolutely, the best way to assay for gold, silver, platinum amp; palladium. 113 Jones Street. Bodfish, CA 93205. Ph: 1-760-379-3330 (Please call between 9 A.M. amp; 9 P.M. California Time) E-Mail: [email protected] Butler Labs Oxyacetylene Torch Assaying. The Torch Fire Assaying Information Page

      Inquire Now
    • Gold Assay Methods - Mineral Processing amp; Metallurgy

      Gold Assay by Electrolysis Method. The current density should be about 0.3 ampere per square decimetre, the fall of potential 2.7 to 4 volts, and the temperature 50° to 60° C. The gold is deposited in about 1½ hours, and is weighed together with the cathode in the usual way.

      Inquire Now
    • What is a Gold Assay? - SD Bullion

      From there, gold assayers have some different gold assaying options. The most common gold bullion assaying processes are the following two methods. Fire Gold Assay (n) the fire assay is one of the oldest and most highly accurate ways to check the gold purity of an item(s). Gold purity is often tested this way, with corresponding tiny amounts of silver and gold melted together in a fire assay porous cupel, in order to verify the amount of non-precious or impure metals in a given sample.

      Inquire Now
    • 3 Ways to Assay Gold - wikiHow

      Mar 28, 2019 · How to Assay Gold - Testing Gold with Fire Prepare your equipment. Place the sample in a crucible. Combine any additives. Heat the reaction to completion. Pour off the top layer. Cool the metal. Cupel the metal. Dissolve the silver. Wash the gold. Weigh the gold.

      (12) 136.1KInquire Now
    • Gold mining assayers amp; assaying companies

      Absolutely, the best way to assay for gold, silver, platinum amp; palladium. 113 Jones Street. Bodfish, CA 93205. Ph: 1-760-379-3330 (Please call between 9 A.M. amp; 9 P.M. California Time) E-Mail: [email protected] Butler Labs Oxyacetylene Torch Assaying. The Torch Fire Assaying Information Page

      Inquire Now
    • Gold Assaying Methods - Mineral Processing amp; Metallurgy

      To determine the amount of gold metal in ore, there are two kinds of gold assay adopted: The dry assaying method (i.e. by fusing the powdered ore with or without fluxes). The wet assaying method (i.e. by the agency of liquids).

      Inquire Now
    • Assaying Gold and Silver Ores: Fire Assaying and Other

      Using the known original weight of sample that was used in the assay, the weight of the gold in the weight of the silver, the content of the ore sample in ounces per ton (or other units) can be calculated. Although fire assay processes have been around for many centuries, they are still somewhat of a mystery to many miners.

      Inquire Now