1. The pocket scale — 500 g × 0.01 g

Weight is identity. Half the questions a jar asks — silver or clad, copper or zinc, real or wrong — are settled by a number in grams, and the scale is the tool every other step leans on. It is also the first tool to buy: it settles more questions per dollar than anything else on this page.

The spec to buy

  • Reads to 0.01 g (two decimal places). This is the non-negotiable line: a 0.1 g kitchen scale cannot separate the coin pairs that matter.
  • Capacity of at least 500 g, so dollars and small stacks fit the pan.
  • A calibration weight included, or accepts a standard one (100 g or 200 g), so the scale can be checked and corrected.
  • A stainless pan, a tare button, and a reading that holds its zero without drifting.

The quality test. the five-gram nickel test from Guide 2. Every US nickel weighs 5.00 g, worn or new. If the scale finds 5.00 g on a pocket-change nickel, trust it with the pairs it exists for: a silver quarter at 6.25 g against a clad one at 5.67 g, a copper cent at 3.11 g against a zinc one at 2.50 g. If it cannot find five grams on a nickel, it goes back in the box.

Typical price: $10–$25 (typical prices checked November 2026 — a guide, not a quote).

Goes with: Guide 2 — Reading a scale for coins · Guide 7 — A starter coin toolkit.

2. The 10x triplet loupe

Dates, mint marks, doubled dies, the tiny letter above a war nickel's dome: the details that move a coin from spend to save are a few millimetres tall, and the loupe is how you read them. It is the second tool to buy, right after the scale.

The spec to buy

  • A true triplet: three lens elements working together (achromatic/aplanatic), which is what keeps the image sharp and colour-true to the edge of the field.
  • 10x magnification — enough for every mark on a coin, with a field wide enough to see the design around it.
  • About 21 mm of optical glass in a metal frame. Plastic lenses and chrome novelty loupes need not apply.

The quality test. read a mint mark at the edge of the lens. Place a coin so the little letter sits at the rim of the field, where Guide 5 says the money hides. Through a triplet, the letter stays sharp and clean; through a cheap singlet it swims, doubles and fringes with colour. The 30x/60x dual loupes fail the other way: too much power, too little field, and usually plastic doing it.

Typical price: $12–$25 (typical prices checked November 2026 — a guide, not a quote).

Goes with: Guide 5 — Mint marks · Guide 7 — A starter coin toolkit.

3. The neodymium magnet

The cheapest tool in the kit and the most decisive. Two of the commonest jar questions are magnetic: is this 1943 cent the common steel one or the priceless bronze error, and is this 1968 Canadian dime silver or nickel? A strong magnet answers both in one second each.

The spec to buy

  • Neodymium (rare-earth), roughly N42 grade — the strength is the whole point, because the verdicts are subtle with anything weaker.
  • A disc or bar about 10–20 mm: strong enough to grab, small enough to handle.
  • Kept in a pouch or box of its own, away from the coins, when it is not testing.

The quality test. the 1968 pair, from Guide 3. Touch it to a 1968 Canadian dime struck in plain nickel: a good magnet grabs it firmly, no hesitation. The silver version of the same coin, same date, ignores it completely. A ceramic fridge magnet is too weak to settle that question — and a blurred verdict is how silver ends up in the spend pile. Same test, other continent: a 1943 steel cent must stick hard; a 1943 cent that does not stick is a different and much more interesting coin.

Typical price: $5–$10 (typical prices checked November 2026 — a guide, not a quote).

Goes with: Guide 3 — The silver edge test · Guide 7 — A starter coin toolkit.

4. Cotton gloves and Mylar 2×2 flips

The protection half of the kit. Coins are handled by their edges, always — a fingerprint left on a face can etch itself into the metal for good — and the coins worth keeping need a home that does them no harm while they wait. Gloves for the handling, flips for the keeping.

The spec to buy

  • Gloves: soft cotton, clean and lint-free, plain weave — no grip dots, no seams across the fingertips. A pair or a small multi-pack.
  • Flips: Mylar (or cardboard flips with a true Mylar window), 2×2 size in the denominations your jar holds, a 100 pack to start.
  • The word to look for is PVC-free. Soft, flexible vinyl flips are the wrong tool at any price.

The quality test. the bend test. A Mylar flip is stiff and crackly when you flex it; a vinyl one is soft and supple — and vinyl sweats a green slime onto coins over the years, the problem Guide 4 warns about. If the pack bends like a sandwich bag, walk away from it, however cheap it is.

Typical price: $12–$22 for the two together (gloves $5–$10; a 100 pack of flips $7–$13) (typical prices checked November 2026 — a guide, not a quote).

Goes with: Guide 4 — Never clean a coin · Guide 7 — A starter coin toolkit.

5. Daylight light for your phone

The fifth job is seeing. A worn date under flat light is a rumour; under light raked in from the side it stands up in relief — in person, and in the photograph. Those photographs are not decoration: they are what photo identification runs on, what your records keep, and what an honest listing shows a buyer.

The spec to buy

  • Daylight colour temperature, about 5000–6500K — the light that tells the truth about a coin's colour and surface.
  • On an arm or stand you can angle, so light can rake across the coin from one side. Dimming is a plus, not a requirement.
  • Or the tidy alternative at the top of the range: a small folding LED light box, around 10–12 inches, which gives even daylight both sides at once.

The quality test. the worn-date read. Lay a worn coin under the light and swing the light low from one side. If the date that was invisible straight-on now reads cleanly — and a phone photo of both sides, no flash, fills the frame just as clearly — the light passes. A warm-white (2700–3000K) household bulb fails it: it flatters cleaned coins and lies about colour. Straight-down flash fails it too, blowing out exactly the letters the photo exists to record.

Typical price: $15–$35 (typical prices checked November 2026 — a guide, not a quote).

Goes with: Guide 7 — A starter coin toolkit · How JarSort photo identification works.

Buy the five jobs, not the gadgets: weigh it, read it, test it, hold it, photograph it — and prove each tool with its test before you trust it with a coin.