Properties of Silver: Density, Conductivity, Hardness & More

Most guides to silver's properties are written for engineers picking a material for a factory. This one is written for the person holding a coin, a bar, or a drawer of old flatware. The same physical facts, density, conductivity, hardness, reflectivity, apply, but here they explain the metal in your hand: why it dents, why it darkens, why industry cannot do without it, and what the numbers actually mean for you.

What Are the Key Properties of Silver?

Silver is a soft, dense, lustrous white metal with the highest electrical and thermal conductivity of any element, excellent reflectivity, and a natural resistance to corrosion that still allows it to tarnish. Those few traits explain almost everything silver does, from why it fills your electronics to why it needs polishing.

Chemically, silver is element number 47, symbol Ag, from the Latin argentum. It sits in Group 11 of the periodic table alongside copper and gold, the three classic coinage metals, and that family resemblance shows in its conductivity and its long history as money. The table below gathers the core numbers, and the sections that follow explain what each one means for anyone who owns the metal.

How Dense Is Silver?

Silver has a density of about 10.49 grams per cubic centimeter, making it noticeably heavier than everyday metals like iron or copper, but much lighter than gold. Density is mass packed into volume, and silver sits in a useful middle ground that you can actually feel.

For comparison, copper is around 8.96 g/cm³ and gold is a dense 19.32, nearly double silver. That heft is one reason a genuine silver coin or bar feels reassuringly solid for its size, and why density based checks help identify real silver: a fake made of a lighter base metal will not match silver's weight for a given volume. This is also why knowing the exact weight of a piece matters so much for its value, which is why an accurate weight is the starting point for valuing any piece.

Why Is Silver Such a Good Conductor?

Silver is the best conductor of both electricity and heat of any metal on Earth, better even than copper or gold, because of its atomic structure and free moving electrons. This single property is the reason silver is indispensable to modern technology.

On the standard scale where copper conductivity is set at 100, silver rates about 106, the highest of any element. Its outer electron moves freely through the metal, carrying electrical current and heat with less resistance than any alternative. That is why silver appears in circuit boards, contacts, and switches, and why attempts to replace it with cheaper copper or aluminum keep falling short in high performance uses. The same trait carries heat superbly, which is why silver feels cold to the touch: it whisks warmth away from your skin fast. We explore how this drives real world demand in our look at silver industrial demand.

How Hard Is Silver, and Why Does It Dent?

Pure silver is soft, rating only about 2.5 to 3 on the Mohs hardness scale, which is why it scratches and dents easily and is usually alloyed with other metals for durability. If your silver marks easily, that is not a flaw; it is the nature of the metal.

Silver's softness comes from its atomic structure, a face centered cubic arrangement that lets the metal deform without breaking. That makes it wonderfully malleable and ductile: it can be hammered into sheets or drawn into wire more readily than almost any other metal. The trade off is that pure silver is too soft for daily wear, so jewelry and cutlery are made from alloys. Sterling silver, at 92.5% silver with 7.5% copper, is the classic example, hard enough to survive use while staying mostly silver. This is exactly why purity and alloy matter when valuing a piece, a topic our silver purity chart lays out fully.

Is Silver Magnetic?

No, silver is not magnetic. It is diamagnetic, meaning it is very weakly repelled by a magnet rather than attracted to it. A genuine silver coin will not stick to a magnet, and this is one of the metal's tell tale traits.

Because silver has no unpaired electrons to align with a magnetic field, it shows no attraction the way iron or nickel do. This non magnetic quality is useful in electronics and specialized equipment where magnetic interference must be avoided, and it also gives owners a simple sanity check, since a piece that jumps to a magnet is not solid silver. That said, non magnetism alone does not prove authenticity, because other non magnetic metals exist, so it is only a first step. For the full set of reliable checks, see our guide on how to test silver.

Why Does Silver Tarnish?

Silver tarnishes because it reacts with sulfur compounds in the air, forming a thin dark layer of silver sulfide on the surface, even though silver resists ordinary rust and corrosion. Tarnish is a surface reaction, not decay of the metal itself.

Unlike iron, silver does not rust, and it resists oxidation from plain air and water. Its weakness is sulfur: traces of hydrogen sulfide in the atmosphere, and contact with certain foods, rubber, or fabrics, produce the familiar yellow to black film. The crucial point for owners is that tarnish is purely cosmetic. It sits on the surface and does not reduce the silver content or the melt value underneath, which is why melting tarnished silver recovers the full metal. Collectors often prefer bright surfaces, but for scrap and bullion valued by weight, tarnish changes nothing. Our guide to cleaning silver covers how to remove it safely when you want to.

What Is Silver's Melting and Boiling Point?

Silver melts at 961.8°C (1,763°F) and boils at 2,162°C (3,924°F), a moderate melting point that makes it workable for casting and refining but well beyond ordinary household heat. These fixed points are also a clue to purity, since pure silver melts at a precise temperature while alloys melt lower and across a range.

The moderate melting point is part of why silver has been worked for thousands of years: it is hot enough to require real equipment, but low enough that ancient smiths could reach it with charcoal furnaces. Sterling silver melts a little lower than pure silver because the added copper shifts the point. Reaching these temperatures safely takes a torch or furnace, a crucible, and proper precautions, and for most owners melting is not worthwhile anyway, since it does not add value. Our guide on melting and refining scrap silver explains why, and when it does or does not make sense.

What Makes Silver Useful Beyond Its Beauty?

Beyond conductivity, silver is prized for the highest reflectivity of any metal and for natural antimicrobial properties, a rare combination that spans mirrors, solar panels, and medicine. Few metals are useful across so many unrelated fields.

Silver reflects around 95% of visible light, which is why it has long backed mirrors and now coats high performance optics and solar reflectors. It is also naturally biocidal, meaning it inhibits bacteria, a property used in wound dressings, water purification, and antimicrobial coatings. Add its conductivity and reflectivity together and you get a metal that is simultaneously decorative, industrial, and medical. This unusual breadth is a big part of why silver holds enduring value: it is wanted not only as money and jewelry but as a working material that industry genuinely needs, which is a large part of why the metal holds enduring value.

Common Questions About Silver's Properties

Final Thoughts

Silver's character comes down to a handful of properties working together. It is soft and dense, which is why it feels solid yet dents and needs alloying. It is the finest conductor of electricity and heat of any metal, which is why industry cannot do without it. It is beautifully reflective and quietly antibacterial, which extends its uses from mirrors to medicine. And it resists corrosion while still tarnishing on the surface, a cosmetic change that never touches its underlying value.

Understanding these traits makes you a smarter owner. You know why your coins feel heavy, why your flatware darkens, why a magnet slides off, and why the metal is worth what it is. Whatever silver you hold, its value ultimately rests on weight and purity, so when you are ready to put a number on it, check the melt value at the current spot price.