Quick Answer: Most of what you dig up will be junk — pull tabs, bottle caps, and rusted iron, with detectorists commonly reporting trash-to-treasure ratios around 3-to-1 or worse. When you do hit something real, the two most common valuable finds are clad and silver coins and gold or silver jewelry. The single biggest mistake new detectorists make with a good find is cleaning it: the American Numismatic Association warns that scrubbing or polishing a coin can cut its collector value by 50% or more. Check the date before you touch anything — every US dime, quarter, and half dollar minted before 1965 is 90% silver; anything after is clad copper-nickel with no silver value at all.
The first few outings with a new detector turn up mostly noise — foil, pull tabs, and the occasional bottle cap. Then something with real weight to it comes out of the ground, and most new detectorists make the same mistake: they scrub it clean right there in the field. This guide covers what you’ll actually find, how to tell a real silver coin from clad change, why cleaning a find can quietly wreck its value, and where to get something properly identified before you decide what it’s worth.
What you’ll actually dig up
The mix skews heavily toward modern trash, and that’s true almost everywhere. Detectorists sharing logged results on forums like TreasureNet commonly report trash-to-treasure ratios around 3-to-1 when digging every signal, and older or more heavily-used sites can run worse. Discrimination settings and iron-audio features (covered in our target ID guide) cut down on wasted digs, but no machine filters out junk completely — it’s a built-in part of the hobby, not a sign your settings are wrong.
| Find type | How common | What to do with it |
|---|---|---|
| Modern trash (pull tabs, foil, bottle caps) | Most signals, by far | Discard, or recycle scrap aluminum |
| Clad coins (post-1965) | Common, especially in parks | Spend it or keep for the roll |
| Pre-1965 silver coins | Occasional, higher in older ground | Never clean — check for numismatic value first |
| Gold or silver jewelry | Rare but highest value | Get purity-tested before selling |
| Relics & historical items | Site-dependent | Photograph and ID before disturbing further |
How to tell if a coin is actually silver
Check the date before anything else. Every US dime, quarter, and half dollar struck before 1965 is 90% silver under the old federal mint spec — a dime carries 0.0715 troy ounces of silver, a quarter 0.179 troy ounces — while every coin struck from 1965 onward switched to a copper-nickel clad sandwich with zero silver content. A worn coin with an illegible date can still be checked: silver isn’t magnetic, so a strong rare-earth magnet test rules out plated fakes, and the coin’s edge shows a solid silver-colored rim rather than the visible copper stripe a clad coin shows when you look at it edge-on.
Gold & Silver Testing Kit
- Acid-test kits covering 10K-24K gold plus sterling silver let you confirm a find's real purity in minutes, before you decide whether it's worth a professional appraisal.
- Most kits bundle a testing stone and a loupe for a closer look at hallmarks and stamps first — check for a "925" or "10K"/"14K" stamp before reaching for the acid at all.
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Never clean a find like this
The single most common mistake with a genuinely good find is cleaning it before anyone with expertise sees it. The American Numismatic Association’s guidance is blunt: cleaning removes a coin’s natural patina and can cut its collector value by 50% or more, and even careful scrubbing leaves microscopic scratches that show up clearly under magnification. Harsh chemicals can go further, penetrating microscopic pores in the metal and causing internal corrosion that only becomes visible years later. If a find is caked in dirt, the ANA-recommended approach is a long, passive soak in plain distilled water for 24-48 hours — no scrubbing, no polish, no coin cleaner — which loosens surface grime without touching the surface underneath. If the coin looks old, unusual, or well-preserved once the dirt is gone, stop there and get it identified before doing anything else to it. Once it’s dry, get it into a protective capsule rather than a pocket — our best coin display case guide covers which case actually protects a coin’s surface versus which one is just for showing it off.
Getting a real appraisal or ID
For US coins that look pre-1900, unusually well-preserved, or simply unfamiliar, a submission to PCGS or NGC — the two major third-party grading services — gets you an authenticated grade and a current market value estimate, which matters far more for pricing than a rough guess. For jewelry, a local jeweler or pawn shop will usually weigh and purity-test a piece for free or a small fee before you commit to selling, which is worth doing even after you’ve run your own acid test. Relics, buttons, and unidentified historical items are often best posted as clear photos — both sides, with a coin included for scale — to a community like r/metaldetecting, where experienced hobbyists frequently supply an accurate ID within minutes, no cost involved. Once you know what you’ve got, our best relic display case guide covers how to store and show off an irregular find like a button or buckle without the damage that comes from leaving it loose in a drawer.
Turning finds into real value
None of this replaces having a machine that separates real targets from junk in the first place — see our best metal detector for coins and best metal detector for jewelry guides for the target-ID and discrimination features that cut down on wasted digs. And if you’re still weighing whether the hobby pays off at all once trash-to-treasure ratios are factored in, our is metal detecting worth it guide runs the honest cash math against what a real starter setup costs.