| Series | Aztec Calendar Silver Rounds |
|---|---|
| Precious Metal Content per Unit | Fractional |
| Fineness | 0.999 |
| Composition | Silver |
| Certification | Uncertified |
| Grade | Ungraded |
| Brand/Mint | Golden-State-Mint |
| Shape | Rounds |
| Diameter | 39 mm |
| Thickness | 4.6 mm |
Check the listing for details. Silver 1/2 oz Aztec Calendar Round. Listed at 27.67 USD. The Aztec Calendar stone is one of the most incredibly well-preserved relics of the Aztec Empire. Generally considered to have been chiseled in the early 1500's, it's intricate design is actually much more than tribal artwork of the period.