MICROCLINE
Silicates, KAl,Si3,O8
Microcline is quite commun at MSH it is almost every where but xtls
are the best in big pegmatites and giant xts are extremely rare like the
one that i am offering you.
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This is straight from my collection a giant unique xtl of microcline made of a baveno twin with 90degres. The quarter beside really show you the size of that superb specimen of 13cm high by 7.5 to it largest side. On the outside, the xtl is covered with mm xtls of albite that gives it a light pink reflect and in the inside of the angle as you can see it is filled with micros minerals like aegerine, microcline, albite, donnayite, rutile, pyrite, steacyte 1 xl only, polylithionite, sphalerite, burbankite grp.remondite(?). By the way that specimen was verified by my friend Jerry Vanvelthiusen before he left us. Microcline 04 |
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A 12.6 x 9.8 cm xtl of microcline. The upper pictures show you both side of it. The upper left is presenting all the detail of the xtl and the upper right make you see all those mm minerals covering the xtl. As showned on the left picture you can see donnayite xtls associated with rutile, albite, calcite etc. The area of 2 x 2cm of the left picture is located at the bottom of the upper left picture. Sides present cleavage. Microcline 01 |
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A 10.7 x 10.3 cm xtl of microcline. The upper pictures show you both side of it. The upper left is presenting all the detail of the xtl and the upper right make you see all those mm minerals covering the xtl. As showned on the left picture you can see plenty of donnayite xtls associated with rutile, albite, calcite etc. The area of the left picture cover 2 cm. One side present cleavage. Microcline 02 |
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| A 8.5 x 8.5 cm specimen of microcline showing
well terminated xtl. The pictures show you both side of it. Associated
with rutile, albite, calcite etc.
Microcline 03 |
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A 12.7 x 12.7 cm xtl of microcline. The upper pictures show you both side of it. The upper left is presenting all the detail of the xtl and the upper right make you see all those mm minerals covering the xtl. Sides present cleavage. Kind of big ! Microcline 05 |
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A 10.7 large x 15.4 high cm xtl of microcline. The upper pictures show you both side of it. There is donnayite xtls associated with rutile, albite, calcite etc. Sides present cleavage. Microcline 06 |
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A 8.5 x 7 cm xtl of microcline. The upper pictures show you both side of it. The upper left is presenting all the detail of the xtl and the upper right make you see all those mm minerals covering the xtl. As showned on the left picture you can see a 1 cm donnayite xtls associated with rutile, albite, calcite etc. Notice that there is a pseud. on top of it and at the base. Sides present cleavage. Microcline 07 |
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A 9 x 8.5 cm specimen of microcline. The upper pictures show you both side of it. The upper left is presenting all the detail of the xtl and the upper right make you see all those mm minerals covering the xtl. As showned on the left picture you can see associated with rutile, albite, calcite etc. The close-up pic on the left picture show mm xtls of microcline peppered with rutile. Microcline 08 |