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Since we have already spoken concerning the virtues of certain herbs and the manner of their use, we must now, in the present chapter, speak of certain stones and their effects, and how marvelous works may be performed through them.
| Magnet (Loadstone) | Coral | Lypercol Possibly a corruption of 'Lupercus' or a specific unidentified mineral |
| Opthalmius The "Eye-stone," believed to aid sight or grant invisibility | Crystal | Urices |
| Onyx | Chrysolite | Lapis Lazuli |
| Feripendamus Likely a corruption of 'Peripendamus' | Heliotrope (Bloodstone) | Emerald |
| Silonites The "Moon-stone" | Epistrites | Iris (Quartz) |
| Topaz | Chalcedony | Balasia (Balas Ruby) |
| Medo | Celidonius (Swallow-stone) | Baleriates |
| Mephites | Gagates (Jet) | Draconites (Dragon-stone) |
| Abaston (Asbestos) | Bena | Echites (Eagle-stone) |
| Adamant (Diamond) | Istmos | Terpistretes |
| Agate | Labices | Hyacinth (Zircon) |
| Alectorius (Capon-stone) | Chrysolite | Quires |
| Esmundus | Beratiden | Sapphire |
| Amethyst | Nicomai | Saunus |
| Beryl | Quiriti | |
| Celonites (Tortoise-stone) | Radianus |
If you wish to know whether your wife is chaste: take the stone which is called the Magnet original: "Magnes". It is of a rusty, iron-like color and is found in the Indian Sea, and sometimes in the regions of Germany original: "theotbonie" / Teutonia in that province which is called Eastern France original: "francia orientalis"; likely referring to Franconia. Place this stone...