Jasperware was matte finish pottery product (some refer to it as porcelain) developed by Josiah Wedgwood and used to imitate onyx or sardonyx in that it had a background color (usually blue, but not always) with the white design in relief.
Jasperware Markings
| Date | Markings |
|---|---|
| Prior to 1860 | Wedgwood |
| 1860 – 1891 | Three Letters: Month, Potter, Year |
| 1891 – 1908 | Wedgwood England (stamped separately) |
| 1908 – 1969 | Wedgwood Made in England (stamped separately) |
| 1970 – Present | Wedgwood Made in England |