No. 6A Magnesium Oxide Fire-Assay Cupel – 1-9/16" Gold & Silver Cupellation

The No. 6A magnesium oxide cupel is designed for fire-assay cupellation of gold, silver and other precious-metal samples. Its porous magnesia construction absorbs molten lead oxide during cupellation, leaving the precious-metal bead available for further analysis.

This Alpine-style cupel is suited to laboratory testing, small-scale assaying and precious-metal refining operations. Manufactured for consistent porosity and high-temperature performance.

Priced and sold individually.

Features

• Magnesium oxide construction

• Designed to absorb lead oxide during cupellation

• Helps separate precious metals from lead-bearing assay buttons

• Smooth interior supports bead formation and removal

• Alpine-style profile

• Suitable for gold and silver fire-assay work

• Compact No. 6A size

• Made in the USA

Specifications

• Size: No. 6A

• Material: Magnesium oxide / magnesia

• Outside diameter (D): 40 mm / 1.57"

• Secondary diameter (D1): 32.7 mm / 1.29"

• Inner diameter (D2): 30 mm / 1.18"

• Overall height (H): 25.4 mm / 1"

• Interior depth (H1): 12.3 mm / 0.48"

• Approximate weight: 49 g

• SKU: 16218-30

• Quantity: One cupel

Intended Applications

• Gold fire assaying

• Silver fire assaying

• Precious-metal analysis

• Cupellation

• Small-scale assay laboratories

• Refining-process testing

• Mining and geological sample evaluation

Package Includes

• One No. 6A magnesium oxide fire-assay cupel

Important Safety Information

Fire assaying involves extreme heat and may produce hazardous lead oxide, metal fumes and contaminated dust. This product is intended for trained users working with a properly designed assay furnace, suitable ventilation and fume extraction, heat-resistant tools, protective clothing, gloves, respiratory protection and eye or face protection.

Do not use with food or household ovens. Used cupels may contain hazardous lead compounds and must be handled, stored and disposed of according to applicable environmental and workplace regulations.

#6, 1-9/16 fire assay cupels made of magnesium oxide. These cupels are perfect for use in gold and silver refining processes. The cupels are manufactured in the United States and are high quality, ensuring accurate and efficient refining.

The cupels are designed to be used in mining equipment for fire assay testing. With these cupels, you can effectively remove impurities from precious metals and obtain pure gold and silver. They are an essential tool for any serious miner or refiner. Purchase now and take your refining process to the next level.

“Alpine style” magnesia cupels.  Ideal for testing and small scale assaying.

Dimensions:

D: 40.0mm 1.57″
D1: 32.7mm 1.29″
D2: 30.0mm. 1.18″
H: 25.4mm. 1.00″
H1: 12.3mm. 0.48″
(grams): 49g

Priced per unit.