100 oz Silver Bar - Johnson Matthey

Johnson Matthey is a British company founded in 1817 and one of the most recognized names in precious metals refining. Its JM diamond hallmark is known to dealers worldwide. The company has since exited bullion bar production, so these bars are no longer being made — supply is finite and they trade on the secondary market.

100 troy ounces of .999 fine silver — about 6.85 pounds, or 3.11 kilograms. The face is stamped with the JM diamond hallmark, 100 OZ, 999, and an SLC refinery mark.

They are two different JM bars. The Canadian bar is stamped 999+ with an individual serial number and a Canadian assay mark. This one is stamped 999 with an SLC hallmark and carries no serial. Both are Johnson Matthey, both are 100 troy oz of investment-grade silver, and both price on weight — the markings simply reflect different refining facilities.

It identifies the refinery that poured the bar. JM operated facilities in several locations over the decades, and bars carry the mark of wherever they were cast. It is a provenance detail rather than a quality difference.

Yes. Silver for a self-directed IRA must be at least .999 fine and produced by an accredited refiner or national government mint. This bar is .999 fine from Johnson Matthey, an LBMA-accredited refiner, so it qualifies. Large bars are common in IRA holdings because per-item storage fees favor fewer, larger pieces. The metal must be held by an approved depository rather than delivered to you — confirm with your custodian.

Premium per ounce. A single 100 oz bar costs less per ounce than ten 10 oz bars, and far less than 100 individual coins, because there is one bar to pour, mark, and handle instead of many pieces. If your goal is maximum silver for the money, this format is where you land.

Divisibility. You sell 100 ounces at once or not at all — there is no taking ten ounces off the top. That means a larger single transaction when you sell, and fewer buyers able to absorb the whole bar. If you want flexibility to sell in pieces, smaller bars or coins suit you better.

These are poured bars, so expect an uneven surface, rounded edges, visible pour texture, and pitting — normal for the format and not damage. As vintage secondary-market pieces they also show handling marks, scuffs, and toning. None of it affects the silver content or what the bar is worth.

A 100 oz bar weighs nearly seven pounds, so it ships fully insured rather than in a standard parcel. Local pickup in Highland, Utah is available at no cost. Call or text before ordering if you have questions about delivery or want to arrange pickup.

Utah exempts investment-grade precious metals from sales tax. A 100 oz silver bar purchased in Utah should not be subject to sales tax. Confirm with your dealer at the time of purchase.