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MD-118223 - Lawsonite - - Archived Reed Station, Tiburon Peninsula, Marin Co., California, USA small cabinet, 7.3 x 5.8 x 2.0 cm.
7.3 x 5.8 x 2.0 cm. A rich specimen of a little-known silicate from the type locality in California intermixed with crystalline schist. It is the light grayish blue mineral you see, which has crystallized within the schist.
MD-169898 - Lawsonite - - Archived Reed Station, Tiburon Peninsula, Marin Co., California, USA small cabinet, 6.1 x 3.2 x 2.5 cm.
6.1 x 3.2 x 2.5 cm. This specimen is from the type locality in California. It features two elongated, lustrous and translucent crystals of pastel pink, lawsonite, in crystals to 4.0 cm in length. This very rare species, embedded in a mica schist, is a calcium, aluminum silicate. Ex. John Ydren collection.
MD-169899 - Lawsonite - - Archived Reed Station, Tiburon Peninsula, Marin Co., California, USA small cabinet, 6.9 x 3.6 x 3.2 cm.
6.9 x 3.6 x 3.2 cm. From the type locality, this matrix specimen features several flat-lying crystals of lustrous, translucent, pastel pink, lawsonite, a rare calcium, aluminum, silicate. The largest crystal measures 2.1 cm across. These are large crystals for the species, and the upper two crystals seem to be terminated. They are major for the species and far above what you usually see from this now defunct location. Ex. John Ydren collection.
MD-257290 - Lawsonite, Glaucophane - - Archived Valley Ford, Sonoma Co., California, USA small cabinet, 5.7 x 2.8 x 2.5 cm.
5.7 x 2.8 x 2.5 cm. Lawsonite is a relatively rare Calcium, Aluminum Silicate, and some of the finest specimens in the world are found in California. Although this piece is not from the type locality in Marin County, it is a good reference specimen featuring a few small, sharp, bladed crystals of white Lawsonite with associated grey Glaucophane. Ex. Allen Heyl Collection.
ORDWAY-25 - Lawsonite var. Chromian - $ 1150 Cape Marmari, Grammata Bay, Syros Island, Greece cabinet, 14.4 x 9.3 x 5.0 cm
A remarkable new find from the Tucson 2012 show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite.These are lustrous, deep green crystals to 2 cm across, of chromium-rich lawsonite, which is a very uncommon silicate found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market. Although slightly corroded , several crystals appear to be doubly terminated. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
ORDWAY-26 - Lawsonite var. Chromian - $ 1450 Cape Marmari, Grammata Bay, Syros Island, Greece large cabinet, 15.4 x 7.3 x 4.5 cm
A remarkable new find from the Tucson show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite.These are lustrous, deep green crystals to 1 cm, of chromium-rich lawsonite, which is a very uncommon silicate found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market.Several crystals appear to be doubly terminated. This specimen has perhaps the sharpest crystals here, with higher luster and sharper edges than most other examples. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
ORDWAY-27 - Lawsonite var. Chromian - $ 1200 SOLD Cape Marmari, Grammata Bay, Syros Island, Greece small cabinet, 7.5 x 4.9 x 4.1 cm
Perched high on a ridge of matrix are several , lustrous, dark green crystals of chromium rich lawsonite, an uncommon silicate mineral. The crystals reach 1.2 cm across and a few appear to be doubly terminated. A remarkable new find from the Tucson 2012 show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite.These are lustrous, deep green crystals to 1.2 cm across, of chromium-rich lawsonite, which is a very uncommon silicate found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
ORDWAY-28 - Lawsonite var. Chromian - $ 1950 Cape Marmari, Grammata Bay, Syros Island, Greece large cabinet, 17.6 x 8.4 x 4.0 cm
A remarkable new find from the Tucson 2012 show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite.These are lustrous, deep green crystals to 1.5 cm, of chromium-rich lawsonite, which is a very uncommon silicate found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market.Several crystals appear to be doubly terminated. This particular specimen is the largest good example I saw, and also has a very rich association with the purple actinolite matrix for contrast. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
ORDWAY-29 - Lawsonite var. Chromian - $ 1100 Cape Marmari, Grammata Bay, Syros Island, Greece cabinet, 11.6 x 7.0 x 3.9 cm
Crystals of lustrous, dark green chromium rich lawsonite, to 1.7 cm across, are festooned on both sides of the host matrix. Several crystals appear to be doubly terminated. A remarkable new find from the Tucson 2012 show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite.These are lustrous, deep green crystals of chromium-rich lawsonite, which is a very uncommon silicate found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
ORDWAY-30 - Lawsonite var. Chromian - $ 400 SOLD Cape Marmari, Grammata Bay, Syros Island, Greece small cabinet, 8.5 x 5.5 x 3.6 cm
Emplaced on a vein of foliated, purple actinolite are sharp crystals of lustrous, deep green, chromium rich, lawsonite, an uncommon silicate. The crystals reach 1 cm across and some appear to be doubly terminated. A remarkable new find from the Tucson 2012 show, of green lawsonite crystals (the color induced by chromium), in contrasting matrix with thin veins of purple actinolite and white muscovite. This uncommon silicate is found in good crystals at only a few locales wordlwide. And, never have we seen them with such color! This is from a small find, but it is unclear exactly when it was found and leaked out to the market. CORRECTION NOTED WITH THANKS TO DR. Maarten Broekmans: The “purple actinolite” you mention in the descriptions, however, is glaukofane or crossite, a sodic amphibole characteristic of high-pressure terranes. This complies with lawsonite being a sodic HP mineral itself, far better than an actinolite would, a calcic (Fe,Mg) amphibole. the silvery white mica is rather paragonite, the Na equivalent of K-muscovite. Also typical for HP settings. Besides that, Cr would color an actinolite stark green too, not purple. In fact, whole (scarcely vegetated) valleys on the island have this bluish-purplish tone over them, an amazing view
RARE08-17 - Lawsonite - $ 1250 SOLD Near Reed Station, Tiburon Peninsula, Marin County, Californa (TYPE LOCALITY) small cabinet, 6.1 x 3.2 x 2.5 cm
This specimen is from the type locality in California. It features two elongated, lustrous and translucent crystals of pastel pink, lawsonite, in crystals to 4.0 cm in length. This very rare species, embedded in a mica schist, is a calcium, aluminum silicate. For the size, these are the best I have seen of the species and I think you could say they are "major" by any standard, about an order of magnitude above and beyond others I have seen for sale. ex. John Ydren collection
RARE08-18 - Lawsonite - $ 450 SOLD Near Reed Station, Tiburon Peninsula, Marin County, Californa (TYPE LOCALITY) small cabinet, 6.9 x 3.6 x 3.2 cm
Also from the type locality, this matrix specimen features several flat-lying crystals of lustrous, translucent, pastel pink, lawsonite, a rare calcium, aluminum, silicate. The largest crystal measures 2.1 cm across. These are large crystals for the species, and the upper two crystals seem to be terminated, but they do not quite have the freestanding completeness of the crystals above, hence the price difference. Still, they are major for the species and far above what you usually see form this now defunct location. ex. John Ydren collection All Content and Design ©1996-2010 The ArkenstonePowered by http://mineralwebsites.comBy-species Galleries | ||||||||||||||||||||||||||||||||||||||||
