| Julia Roberts' birthstone | 29 |
| Jeweler's mineraloid | 24 |
| J.E.C.'s birthstone | 23 |
| It's worn by some Libras | 28 |
| It's worn by many Libras | 28 |
| It's often set in a ring | 28 |
| It's found in a ring | 24 |
| It's formed from silica | 27 |
| It may be found in a ring | 25 |
| It may be black or harlequin | 28 |
| It has a play of colors | 23 |
| Heat-sensitive gemstone | 23 |
| Glittering white stone | 22 |
| Gift for some Scorpios | 22 |
| Gemstone of hydrated silica | 27 |
| Gemstone from Australia | 23 |
| Gemstone for most Libras | 24 |
| Gem mined mostly in Australia | 29 |
| Gem mined mainly in Australia | 29 |
| Gem for a Scorpio, perhaps | 26 |
| Form of silicon dioxide | 23 |
| Floatstone, for example | 23 |
| Fire ___, semiprecious stone | 28 |
| Fiery October birthstone | 24 |
| Columbus Day birthstone | 23 |
| Classic symbol of bad luck | 26 |
| Black or harlequin follower | 27 |
| Birthstone for this month | 25 |
| Birthstone for October | 22 |
| Birthstone for many Libras | 26 |
| Birthstone for many a Libra | 27 |
| Birthstone for a Libra | 22 |
| Birthstone following sapphire | 29 |
| 2008 Mars probe discovery | 25 |
| "Fire" stone | 22 |
| Â Â Gem for some Libras | 29 |
| Change colors, in a way | 23 |
| Display a shimmer of colors | 27 |
| Gemstones for some Libras | 25 |
| Semitransparent stones | 22 |
| South Australian exports | 24 |
| Gifts on October birthdays | 26 |
| Gemstones from Australia | 24 |
| Gems usually without facets | 27 |
| Gems that may be black | 22 |
| Black and fire followers | 24 |
| Birthstones for some Scorpios | 29 |
| Opposite of transparent | 23 |
| Impossible to see through | 25 |
| Clear as mud, so to speak | 25 |
| Eyeball-bending pictures | 24 |
| Eyeball-bending drawings | 24 |
| Illusory painting genre | 23 |
| Dizzying gallery display | 24 |
| Works with visual effects | 25 |
| Bridget Riley's genre | 25 |
| Visually teasing images | 23 |
| Victor Vasarely's genre | 27 |
| Some psychedelic designs | 24 |
| Some drawings that deceive | 26 |
| Perceptual abstraction | 22 |
| Certain abstract paintings | 26 |
| Bedazzling museum works | 23 |
| Abstract painting style | 23 |
| Abstract form of the '60s | 29 |
| 1960s painting movement | 23 |
| '60s painting movement | 26 |
| Works with afterimages | 22 |
| Work with wavy lines, maybe | 27 |
| Work with a pattern, maybe | 26 |
| Victor Vasarely specialty | 25 |
| Style with illusory motion | 26 |
| Some psychedelic decoration | 27 |
| Some modern museum designs | 26 |
| Some deceptive designs | 22 |
| Some 60's paintings | 23 |
| Some 60's museum exhibits | 29 |
| Richard Anuszkiewicz pictures | 29 |
| Museum display, at times | 24 |
| Mod style, in painting | 22 |
| Magic Eye picture, e.g. | 23 |
| Julian Stanczak's genre | 27 |
| Josef Albers' style | 23 |
| Illusory movement movement | 26 |
| Head-spinning paintings | 23 |
| Head-spinning hangings | 22 |
| Genre of dizzying drawings | 26 |
| Eyeball-bending paintings | 25 |
| Eyeball-bending designs | 23 |
| Eye-tricking paintings | 22 |
| Dizzying painting movement | 26 |
| Dizzying painting genre | 23 |
| Dizzying museum display | 23 |
| Dizzying gallery hangings | 25 |
| Dizzying abstract genre | 23 |
| Dazzling gallery display | 24 |
| Bridget Riley's movement | 28 |
| Bridget Riley creations | 23 |
| Abstract visual images | 22 |
| '60s painting style | 23 |