Corsi 744, approx. 145 x 73 x 40 mm, © Oxford University Museum of Natural History
| OUMNH Number: | 744 |
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| Name and quarry location: | Diaspro antico, locality unknown |
| Geological description: | Brecciated jasper with black-speckled clasts, many with full or partial rims of opaque white chalcedony. Colourless/white/grey agate matrix has patchy yellow speckling, euhedral crystal inclusions of goethite, and minor late-stage crystalline quartz. No sardonyx is present. |
| Comments: | Provenance not known. |
| References: | Corsi (1845) 225-226 |
| Further information: |
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| Corsi's classification: | Class 14. Quartz and its varieties; Species 6. Jasper; i. Antique jaspers |
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| Corsi's text: | 186.2 Diaspro. Jaspis. Diaspro antico |