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Mineral specimens search results for [ Orthoclase ]Page bottom
TBF460XXX: Anorthoclase (variety of Albita)
Specimen formed by a group of crystals of Albite (anorthoclase variety) with a prismatic habit, transparent to translucent, with well-defined faces and edges. They show a slight cream color with honey tones, more intense in some areas, they show internal ferruginous inclusions that provide contrast and they show the characteristic blue reflections of some transparent anorthoclases. The Pili Mine is known for the presence of anorthoclase (variety of Albite), which appears in well-defined crystals associated with alkaline volcanic rocks. This type of alkali feldspar is relatively uncommon compared to other feldspars, and its presence in the area adds mineralogical interest to the locality. The mineralization is situated in a volcanic context, related to igneous rocks of alkaline affinity. Anorthoclase forms under high-temperature crystallization conditions in sodium- and potassium-rich magmas, typical of evolved volcanic systems.
Pili Mine, Saucillo, Municipio Saucillo, Chihuahua  Mexico
Specimen size: 5.1 × 4.6 × 3.4 cm = 2.01” × 1.81” × 1.34”
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MM6AM7: Orthoclase
Floater crystal of Orthoclase with very sharp crystal forms, with Carlsbad-law twinning, good luster and an unusual degree of transparency for the species.
We will ship the specimen in its original Perky box from the Robert J. (Bob) Noble collection, which also contains the label.
Niaslo, Basha Valley, Shigar District, Gilgit-Baltistan (Northern Areas)  Pakistan
Specimen size: 3.3 × 2 × 1.2 cm = 1.30” × 0.79” × 0.47”
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JFD46AN8: Orthoclase (Carlsbad twin)
Saying the word Zarzalejo and thinking of Carlsbad twins is pretty much the same thing. Generations of collectors have gone there to scratch around and find little treasures. Let us add that the orthoclases from Zarzalejo tend to be more 'fresh', less weathered, than those from other places.
Zarzalejo, Comarca Sierra Oeste, Community of Madrid  Spain
Specimen size: 4.5 × 4.1 × 2.3 cm = 1.77” × 1.61” × 0.91”
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20CRB46: Orthoclase (variety adular), Chlorite
Parallel aggregates of white Orthoclase crystals (variety adularia), with distinct growth striations, perfectly defined faces and edges, and interpenetration twins, all dotted with a multitude of deep green Chlorite crystals. The specimen comes from the former collection (duplicates) of Carles Curto (number 2002.16), whose label and computer file we will send to the buyer.
Sustenhorn, Sandbalm, Voralp Valley, Göscheneralp, Göschenen Valley, Göschenen, Reuss Valley, Uri  Switzerland (±2002)
Specimen size: 7.8 × 6.8 × 5.4 cm = 3.07” × 2.68” × 2.13”

Main crystal size: 6.1 × 4.3 × 3.5 cm = 2.40” × 1.69” × 1.38”
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TX10AN1: Orthoclase (variety adularia)
Group on matrix of very sharp Orthoclase crystals (variety adularia), with distinct parallel growths, snow-white, with good lustre. An alpine classic. We will ship the specimen in its original Perky box from the Robert J. Noble collection, which also contains the label, which shows that it was previously in the Melanson collection.
Pailgrat, Hollersbach im Pinzgau, Zell am See District, Salzburg  Austria
Specimen size: 3.4 × 2.7 × 2.5 cm = 1.34” × 1.06” × 0.98”
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EXP98AP4: Orthoclase (variety adularia)
Very aerial parallel growths of sharp Orthoclase (adularia variety) crystals, with good luster and a snow-white color. On matrix. It comes from the Senckenberg Museum in Frankfurt and has several old labels with it.
Amsteg, Silenen, Reuss Valley, Uri  Switzerland
Specimen size: 7.4 × 5.7 × 4.1 cm = 2.91” × 2.24” × 1.61”

Main crystal size: 1.2 × 0.5 cm = 0.47” × 0.20”
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RM6G2: Orthoclase (variety adularia)
A classic alpine sample (is the variety adularia). A Floater, more clear than usual with a very intense vitreous luster.
Cavradi gorge (Val Cavradi), Municipality of Tujetsch (Tavetsch), Surselva District, Grischun (Grisons; Graubünden)  Switzerland
Specimen size: 5.8 × 4 × 3.5 cm = 2.28” × 1.57” × 1.38”
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RP96J3: Orthoclase (variety adularia)
The crystal is considerably transparent and has very well defined faces and edges. It is only partially covered by Chlorite.
The specimen is noted as purchased in 1949 and it is with a manuscript label of Folch we’ll send to the buyer.
Gerenthal, Oberwallis  Switzerland (±1949)
Specimen size: 5.7 × 5 × 2.8 cm = 2.24” × 1.97” × 1.10”
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RA27AE4: Orthoclase (variety adularia) with Chlorite
Floater aggregate of very sharp crystals that are translucent white with Chlorite inclusions in some areas and a small Quartz crystal. A Swiss classic of very good quality.
Tiefenbach, Urseren, Uri  Switzerland (±1949)
Specimen size: 9 × 8.7 × 5.2 cm = 3.54” × 3.43” × 2.05”
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RE16K4: Orthoclase (variety adularia) with Chlorite
Manebach twin of two crystals with selective inclusions of Chlorite: some of the faces have the inclusions while others are completely free of them.
Binntal, Wallis  Switzerland (1949)
Specimen size: 2.6 × 2.4 × 2.4 cm = 1.02” × 0.94” × 0.94”

Main crystal size: 1.8 × 1.8 cm = 0.71” × 0.71”
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RD16K4: Orthoclase (variety adularia) with Chlorite
Manebach twin of two crystals with selective inclusions of Chlorite: some of the faces have the inclusions while others are completely free of them.
Binntal, Wallis  Switzerland (1949)
Specimen size: 2.7 × 2.4 × 2.4 cm = 1.06” × 0.94” × 0.94”
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VC37Z4: Orthoclase (variety adularia) with Chlorite
Parallel growths of Orthoclase (variety adularia) crystals that are very bright, translucent, have very well defined faces and edges and are with oriented growths of dark green Chlorite. A Swiss classic.
Central St Gotthard Massif, Leventina, Ticino (Tessin)  Switzerland (±1979)
Specimen size: 9.8 × 6.2 × 4.8 cm = 3.86” × 2.44” × 1.89”
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RG14K4: Orthoclase (variety adularia) with Chlorite and Hematite
Parallel growth of sharp crystals of very well defined faces and edges, clean, translucent and bright on one of the sides of the sample and with Chlorite inclusions on the opposite.
Maderanertal, Uri  Switzerland
Specimen size: 3.2 × 3 × 2.4 cm = 1.26” × 1.18” × 0.94”
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RF16K4: Orthoclase (variety adularia) with chlorite and Hematite
Parallel growths of adularia crystals of tabular appearance, very rich in chlorite inclusions and also with very bright Hematite inclusions.
Maderanertal, Uri  Switzerland
Specimen size: 4.3 × 3.4 × 2.8 cm = 1.69” × 1.34” × 1.10”

Main crystal size: 2.2 × 1.7 cm = 0.87” × 0.67”
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RD71M0: Orthoclase (variety adularia) with Clinochlore
Two very sharp and twinned Orthoclase (variety adularia) crystals, with an excellent color and brilliance, with some inclusions of Clinochlore. On a matrix covered by small adularia and Quartz crystals.
The handwritten Folch label states that it was bought directly from a mountain guide in 1957.
Grossvenediger (northwest), Obersulzbach Valley, Salzburg  Austria (±1957)
Specimen size: 14.5 × 11.5 × 11 cm = 5.71” × 4.53” × 4.33”
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TM96H9: Orthoclase (variety adularia) with Clinochlore
Excellent group of crystals with very sharp faces and edges, partially covered by Chlorite and with very marked Baveno twins. Very esthetic.
Valais  Switzerland (±1970)
Specimen size: 11.3 × 7.7 × 4 cm = 4.45” × 3.03” × 1.57”

Main crystal size: 5.1 × 4.5 cm = 2.01” × 1.77”
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22TXM13: Orthoclase (variety adularia), Chlorite
Group of Orthoclase crystals (variety adularia) formed by a main group of sharp flattened crystals intertwined with others of lesser dimensions and all of them completely covered by Chlorite crystals that give the specimen a mossy appearance. It comes from the old collection of Robert-Auguste Touchon, one of a batch of pieces from Pizzo Centrale in Switzerland, an area well known to collectors.
Pizzo Centrale, Airolo, Central St Gotthard Massif, Leventina, Ticino (Tessin)  Switzerland
Specimen size: 5.1 × 2.6 × 2.6 cm = 2.01” × 1.02” × 1.02”
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NBF76AO5: Orthoclase twinned
Orthoclase crystal with very sharp faces and edges and a very well defined double Baveno-Manebach twin. The specimen comes from the collection of Santiago Jiménez who, especially in the 1980s and '90s, put together an excellent collection with a very good representation of the mineralogy of northern Spain.
Bustarviejo, Comarca Sierra Norte, Community of Madrid  Spain
Specimen size: 7.6 × 3.3 × 2.8 cm = 2.99” × 1.30” × 1.10”
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NM58M9: Orthoclase with Albite and Quartz
The pink crystals of Orthoclase are small, very well defined, and have epigenetic growths of Albite. The matrix is also very rich in Albite and has Quartz crystals. The piece is from a well known locality but which has yielded few significant specimens.
La Batllòria, Sant Celoni, Comarca Vallès Oriental, Barcelona, Catalonia / Catalunya  Spain
Specimen size: 6.6 × 5.3 × 3.3 cm = 2.60” × 2.09” × 1.30”
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JFD21AN6: Orthoclase with Quartz (variety smoky)
Another proof of Lluís Daunis's good work as a field collector. This time with a specimen from the Sierra de Madrid with very clean and 'fresh' Orthoclase crystals and with Quartz crystals (smoky variety), well separated and quite perpendicular to the Orthoclase crystal plate. It should be noted that I have it listed as Orthoclase and not Microcline as per personal communication from the Geological and Mining Institute of Spain, in Madrid.
(La Cabrera pluton), La Cabrera, Comarca Sierra Norte, Community of Madrid  Spain
Specimen size: 10.4 × 9.3 × 3 cm = 4.09” × 3.66” × 1.18”

Main crystal size: 2 × 0.9 cm = 0.79” × 0.35”
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DV96AH2: Orthoclase with Quartz (variety smoky)
Polycrystalline growths of Orthoclase crystals with very well defined faces and edges. They are very bright and are partially coating a Quartz crystal.
The Daunis collection was, in the 70’s and the 80’s, a reference for the local prospectors of the Barcelona area.
(La Cabrera pluton), La Cabrera, Comarca Sierra Norte, Community of Madrid  Spain (±1970)
Specimen size: 8.9 × 8.8 × 5.3 cm = 3.50” × 3.46” × 2.09”
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2M12: Orthoclase, Albite, Stilbite-Ca, Quartz
The Strzegom granite quarries are a classic locality for pegmatite minerals. In this case, creamy white Orthoclase crystals are seen on a matrix of bright snowy white Albite crystals. These are accompanied by very dark Quartz crystals (smoky variety) and light brown Stilbita-Ca crystals, making the whole an attractive combination.
Strzegom, Strzegom-Sobótka Massif, Świdnica District, Lower Silesia Voivodeship  Poland
Specimen size: 15.3 × 12.2 × 3.2 cm = 6.02” × 4.80” × 1.26”

Main crystal size: 3.6 × 3.0 cm = 1.42” × 1.18”
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FD6B9: Twinned Orthoclase
The Carlsbad twin name came from the Carlsbad locality in the Czech Republic. This Orthoclase also came from this locality and "guess what?": it is twinned by the Carlsbad law. A "type locality twin" from an old glorious European locality.
Karlovy Vary (Carlsbad), Karlovy Vary District, Karlovy Vary Region, Bohemia  Czech Republic
Specimen size: 6 × 3.2 × 2 cm = 2.36” × 1.26” × 0.79”
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HM60DA: Twinned Orthoclase
Floater Orthoclase crystal with Carlsbad-law twinning, very well defined and complete crystal forms, and of considerable size compared to others known from here. The locality is little known to collectors.
Former collection of Lluís Daunis
Béjar, Comarca Sierra de Béjar, Salamanca, Castile and León  Spain
Specimen size: 4.8 × 3.7 × 1.7 cm = 1.89” × 1.46” × 0.67”
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FE16: Twinned Orthoclase
Nice classic Carlsbad twinned Orthoclase - very sharp and good luster.
Zarzalejo, Comarca Sierra Oeste, Community of Madrid  Spain
Specimen size: 5.2 × 4.6 × 2.2 cm = 2.05” × 1.81” × 0.87”

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