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Mineral Specimens with rutile
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3.7 x 1 x .9 cm. A fine, lustous single crystal of Rutile, with deep red-brown color and metallic sheen. The crystal is also nicely terminated, with the base expressing just a hint of a (double) termination. Ex. Charlie Key Collection.
2.8 x 0.4 x 0.4 cm. A beautiful, sharp, deep wine-red rutile crystal with splendent lustre and superlative striations. Complete-all-around and pristine. This is a large rutile from this classic locale. Ex. Jaime Bird Collection.
4.6 x 2.8 x 2.1 cm. Superb, textbook biotite crystals mark this classic from an old find (1960s if I recall correctly, or maybe the 50s), at the site of the famous hiddenite mines. This crystal is superbly displayed on matrix, a small miniature overall.
5.2 x 3.4 x 3.4 cm. A large, two-sided, V-twin rutile crystal from a classic but very uncommon Pennsylvania locality - Bart Township, Lancaster County. The lustrous, reddish-brown pristine crystal is complexly terminated. Undoubtedly old material from the 19th century, turned up in an old collection on the East Coast.
3.2 x 2.6 x 0.3 cm. A beautiful, scintillating, delicate wafer of herringbone-patterned, deep wine-red rutile needles from Diamantina, Brazil. An exquisite, two-sided specimen.
3.5 x 2.5 x 1.6 cm. These are Swiss classics utterly recognizable and distinct from anything else: gemmy, brilliant red rutile crystals grown epitaxially (oriented) on the surface of lustrous, metallic hematite blades. Ex. Bill Pinch Collection.
4.9 x 4.0 x 2.7 cm. An elegant, complete all-around and pristine combination specimen from recent finds in the Shigar Valley of Pakistan. Three hexagonal, gemmy and lustrous, pastel-pink apatite crystals are set in front of a water-clear, glassy, quartz crystal. Lustrous, wine-red rutile needles are included in and protrude from both the apatite and quartz crystals.
3.0 x 0.9 x 1.3 cm. An elongated group of silvery-tan colored prismatic Anatase crystals which have good luster and excellent sharpness. They are accented by small metallic golden-brown colored Rutile crystals towards the center of the specimen. These are classic specimens, and to have two Titanium Oxides together on the same piece is pretty cool. Ex. Brian Kosnar Collection.
2.9 x 1.9 x 1.3 cm. A striking toenail from the Carl Davis Collection. A pristine, complete all-around, water-clear quartz crystal encloses highly lustrous, golden rutile needles. The long needles look just like golden straws.
1.8 x 1.5 x 1.5 cm. A sharp, cyclic-twinned brookite crystal replaced by lustrous rutile. Old classic material. Mike Howard had an article in Rocks and Minerals a few years back that talked about these crystals, in considerable detail. Basically, any "brookite" that is a pseudohexagonal bipyramid (not twinned) and that is bigger than a quarter-inch is virtually always replaced by rutile (this can be recognised by striations that sometimes create a "moire effect", on the surface. You can also often spot a hint of the red internal reflections that characterize rutile, and the color is a little different from the black lustrous brookite xls). Ex. Carlton Davis Collection.
1.82 x 1.8 x 1.4 cm. A sharp, cyclic-twinned brookite crystal replaced by lustrous rutile. Old classic material. Much better in person. Mike Howard had an article in Rocks and Minerals a few years back that talked about these crystals, in considerable detail. Basically, any "brookite" that is a pseudohexagonal bipyramid (not twinned) and that is bigger than a quarter-inch is virtually always replaced by rutile (this can be recognised by striations that sometimes create a "moire effect", on the surface. You can also often spot a hint of the red internal reflections that characterize rutile, and the color is a little different from the black lustrous brookite xls). Ex. Carlton Davis Collection.
3 x 1.9 x 1.4 cm. This clear, doubly-terminated quartz encloses a 2.2 cm doubly-terminated brookite crystal that is floating in perfect alignment to the axis of the quartz, as if it grew around the brookite as a seed. Small acicular rutile crystals shoot off the brookite, as well.
3.0 x 2.5 x 1.0 cm. An aesthetic and beautiful cluster of five, radial, golden starbursts of rutile needles epitaxial on mirror-bright, black hematite crystals from a recent find at Novo Horizonte, Brazil. The asymmetrically placed, but central starburst is beautiful.
7.5 x 4.1 x 2.6 cm. A striking and very aesthetic rutilated smoky quartz crystal cluster from Brazil. A gorgeous, golden, starburst of rutile blades epitaxial on hematite is enclosed and on an excellent group of sharp, glassy, water-clear, smoky quartz crystals. This is a beautiful, complete-all-around specimen.
2.8 x 1.5 x 1.2 cm. A gemmy and lustrous, rarely available, doubly terminated emerald crystal from the Rist Mine of North Carolina. The upper portion of the crystal is much gemmier than the lower portion. Both terminations are lightly frosted. The crystal contains embedded clove-brown rutile needles and blades and muscovite plates. A classic and excellent older North Carolina emerald. Weighs 8 grams.
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Rob Lavinsky, rob@irocks.com
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share specimen![Rutile from Gamsberg, Khomas Region, Namibia [db_pics/mdpics/MD-229888a.jpg]](db_pics/mdpics/MD-229888a.jpg)
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