OUMNH Number: | 750 |
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Name and quarry location: | Opal, resinite della Tolfa, from Monti della Tolfa, near Civitavecchia, Rome, Lazio, Italy |
Geological description: | Massive resinite, a variety of opal; ferruginous coloration. |
Comments: | Resinite is a variety of opal. Jervis (1881) does not record Tolfa as a provenance of resinite or any other variety of opal. This is the only sample in Corsi's collection that is protected by a very thin sheet of glass glued to the top surface. The specimen is clearly very fragile and has been broken into many pieces and glued back together. |
References: | Jervis (1881) 377 |
Further information: |
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Corsi's classification: | Class 14. Quartz and its varieties; Species 6. Jasper; ii. Italian jaspers |
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Corsi's text: | 187.3 Resinite della Tolfa |