History of Composition
| Years | Mass | Diameter/Shape | Composition |
|---|---|---|---|
| 2000–present | 4.40 g | 23.88 mm | 94.0% steel (unspecified alloy), 3.8% copper, 2.2% nickel plating |
| 1968–1999 | 5.05 g | 23.88 mm | 99.9% nickel |
| 1967-1968 | 5.83 g | 23.88 mm | 50% silver, 50% copper |
| 1953–1967 | 5.83 g | 23.88 mm | 80% silver, 20% copper |
| 1920–1952 | 5.83 g | 23.62 mm | 80% silver, 20% copper |
| 1910–1919 | 5.83 g | 23.62 mm | 92.5% silver, 7.5% copper |
| 1908–1910 | 5.81 g | 23.62 mm | 92.5% silver, 7.5% copper |
Read more about this topic: Quarter (Canadian Coin)
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—Henry David Thoreau (1817–1862)
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—Derek Gjertsen, British scientist, author. Science and Philosophy: Past and Present, ch. 3, Penguin (1989)