Adularia with Chlorite
St Gotthard, Central St. Gotthard Massif, Leventina
8.7 x 6.4 x 3 CM (cabinet)
Fine Swiss Adularia crystals up to 2.4 CM with green zoned inclusions of Chlorite are well presented on the matrix. From the type locality (St Gotthard) Most of these crystals have a slight dusting of Chlorite on the outside as well but the majority of the faces are glassy and transparent. Very pleasing esthtetics from almost any angle this is a choice and showy specimen of a usually unimpressive specie. No damage which is incredible for a piece with this complexity. Excellent Alpine classic that shows the textbook monoclinc form perfectly.
A super sharp, clear and lustrous gemmy Adularia crystal is nicely perched on matrix. A very old specimen, ex Roberto Palumbo (Rome, Italy mineral dealer active 1928-1945) with his label. The Feldspar is distinctly twinned as well and perfcely undamaged even at high magnifications. The locality of Monte Forno in the Piedmont has several well known alpine localities on it but also many tiny clefts that were worked mostly by Swiss Strahlers over a very long period. This is a choice piece with the Adularia well above the matrix and presenting well from all sides.
A classic and fine old specimen of the Adularia variety Valencianite. Ex Harvard University, Ken Hollman and Terry Szenics collections. From the Valenciana Mine(Guanajuato, Mexico) this has sizable crystals to 2.7 CM,and is in perfect undamaged condition. A dusting of small clear Quartz crystals and a few micro Sulfides ads some character as well.
A large and fine old Swiss Orthoclase crystal that is a well formed Manebach twin with fine edge striations. Several older labels included date this back to the 19th century. This Adularia is very large, translucent to transparent and with textbook perfect form. From just the right angle the fine striations make an interesting display of diffraction colors and shows a rich iridescence. Classic and impressive.
A wonderfully esthetic example of Swiss Adularia, a well defined Manebach twin set on a slender shard of matrix. Excellent condition, sawn on the back to remove this without damage. You don't need to be a Feldspar collector to appreciate the setting of this twin!