About Us - Gold n Treasures

Step One

STEP 1:
A metal scooper is used to place scrap gold into a graphite crucible for melting.

Step Two

STEP 2:
Borax is added to separate gold from stones and other non-metal elements. After a few minutes, the borax will pull the non-metal content to the bottom, allowing for more accurate purity evaluation.

Note: Borax is a mineral, also known as a salt of boric acid, typically a white powder with soft, colorless crystals that dissolve easily in water.

Step Three

STEP 3:
Gold is left to melt in a hot furnace (~2060°F) for approximately 20 to 25 minutes.

Step Four

STEP 4:
As the metal begins to ball up and swirl, stirring with a graphite rod ensures an even and homogeneous distribution of gold content, allowing for more precise purity measurement.

Step Five

STEP 5:
We dip a vacuum glass tube attached to tongs into the molten gold to take a sample of the bar at approximately 2000°F.

Step Six

STEP 6:
Molten gold is poured into a mold. All metals except gold float to the surface, forming a slag of molten chloride (Step 2).

Step Seven

STEP 7:
We drill the gold bar to extract a sample for testing to determine the precious metal content.

Step Eight

STEP 8:
We perform Fire Assay to measure the gold content. This involves taking a small scraping from the article, typically about 250 mg, weighing it accurately, wrapping it in lead foil with some added silver, and cupelling it in a furnace at about 1100°C to remove all base metals. The resulting gold-silver alloy button is then placed in nitric acid to dissolve out the silver (a process known as ‘parting’) and re-weighing the resulting pure gold.

Step Nine

STEP 9:
As a final step, we place the sample from both the liquid (Step 5) and solid (Step 7) stages of the bar under the X-Ray Fluorescent Spectrometer to ascertain its purity. If the difference in purity data exceeds 1%, the process is repeated.