CoinMetalIdentifier
Coin Metal Identifier
Coin Metal Identifier
Input coin weight and dimensions to help identify the metal composition.
Calculate Specific Gravity
Common Coin Metal Reference
| Metal | Composition | Sp. Gravity | US Examples |
|---|---|---|---|
| Copper (pure) | 99.9% Cu | 8.96 | Large cents (1793-1857), half cents |
| Bronze (95/5) | 95% Cu, 5% Sn/Zn | 8.85 | Lincoln cents (1909-1942, 1944-1982) |
| Brass (95/5) | 95% Cu, 5% Zn | 8.60 | Gold-plated tokens, some world coins |
| Copper-Nickel (75/25) | 75% Cu, 25% Ni | 8.92 | Nickels (1866+), clad coinage edges |
| Cupro-Nickel Clad | Cu core, Cu-Ni outer layers | 8.92 | Dimes/Quarters/Half (1965+), SBA/Sac/Pres dollars |
| 90% Silver | 90% Ag, 10% Cu | 10.33 | All US silver coins (1792-1964) |
| 40% Silver | 40% Ag, 60% Cu | 9.53 | Kennedy halves (1965-1970), Eisenhower dollars (1971-1976 S) |
| Sterling Silver | 92.5% Ag, 7.5% Cu | 10.35 | Some commemorative coins, world coinage |
| 90% Gold | 90% Au, 10% Cu | 17.16 | US gold coins (1795-1933), $1-$20 denominations |
| Gold (.999) | 99.9% Au | 19.32 | Modern bullion (American Buffalo, commemoratives) |
| Steel (zinc-coated) | 99% Fe, zinc coating | 7.85 | 1943 Lincoln cent (wartime steel) |
| Zinc-core (Cu-plated) | 97.5% Zn, 2.5% Cu plating | 7.10 | Lincoln cents (1982+) |
| Platinum | 99.95% Pt | 21.45 | Platinum Eagle bullion, some commemoratives |
| Manganese Brass | 77% Cu, 12% Mn, 7% Zn, 4% Ni | 8.00 | Sacagawea/Presidential dollar (2000+) |
Tentukan komposisi logam syiling. Kenal pasti emas, perak, tembaga dan logam lain yang digunakan dalam pengeluaran syiling.
Key Features
Pangkalan data komposisi logam
Panduan ujian ketumpatan
Pengenalan warna
Maklumat aloi
Cara Mengenalpasti Logam Syiling
Periksa Warna
Syiling emas adalah emas, syiling perak adalah perak, syiling tembaga adalah kemerahan
Semak Berat
Logam yang berbeza mempunyai ketumpatan berbeza yang mempengaruhi berat
Permukaan Ujian
Cari toning (perak) atau patina yang menunjukkan jenis logam
Sahkan Spesifikasi
Padankan dengan spesifikasi rasmi untuk jenis syiling tersebut
Use Cases
Pengenalan logam
Penilaian nilai jongkong
Pengesahan komposisi
Pengesanan palsu
Frequently Asked Questions
Bagaimanakah saya boleh mengetahui sama ada syiling itu diisi emas vs emas pepejal?
Ujian berat dan ketumpatan boleh membantu. Syiling emas pepejal memenuhi spesifikasi berat rasmi; syiling berisi emas lebih ringan.
Apakah logam yang digunakan dalam syiling A.S.?
Syiling A.S. moden adalah bersalut tembaga-nikel atau tembaga-mangan. Dari segi sejarah, emas dan perak digunakan.
Adakah jenis logam mempengaruhi nilai syiling?
Ya, kandungan logam berharga meningkatkan nilai dengan ketara. Syiling emas dan perak bernilai lebih daripada logam asas.
Tool Information
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