Guide
Microcline specimens for sale
51 for sale · $30–$15,000 USD
468 in the gallery
Microcline is a potassium aluminum silicate mineral in the feldspar group. It forms triclinic crystals with a glassy to pearly lustre and can display a range of colors from milky white to greens, yellows, and pinks in well-formed crystals. Its commonly encountered habit includes blocky prismatic crystals and granular masses, often twinned, that can persist as sizeable specimens in the right deposits.
- Formula
- K(AlSi3O8)
- Rarity
- Common
- Stability
- Stable
- Collector interest
- Moderate Interest
- Classification notes
- Alkali feldspar (tectosilicate framework silicate)
Key characteristics
- Crystal system
- triclinic
- Mohs hardness
- 6–6.5
- Specific gravity
- 2.54–2.57
- Luster
- vitreous, pearly
- Transparency
- transparent, translucent, opaque
- Color
- colorless, white, gray, yellow, red, pink, green, blue
- Streak
- white
- Cleavage
- perfect
- Fracture
- uneven, conchoidal
- Crystal habit
- prismatic, tabular, granular, massive
- Gem mineral
- Classic / historic
Buy Microcline specimens
View all 51Where Microcline is found
Top localities
- Lake George22 specimens
- Hashupa19 specimens
- Papachacra19 specimens
- Himalaya Mine18 specimens
- R. A. Kosnar claim16 specimens
- Erongo Mountains12 specimens
- Teller County10 specimens
- Mt Antero8 specimens
- Shigar Valley8 specimens
- Dreamtime claim7 specimens
Guides
All guides
Guide
Microcline from Shigar Valley, Gilgit-Baltistan, Pakistan
Microcline from Shigar Valley, Pakistan — white to pale cream crystals in open pockets, creating display-worthy assemblages with aquamarine; prized by collecto…Read guide
Guide
Microcline from Erongo Mountains, Namibia
Microcline - Erongo Mountains, Namibia: pale cream feldspar with blue aquamarine and black schorl; renowned locality and notable for feldspar identification.Read guideAbout Microcline
Notable specimens come from diverse locales around the world, including classic feldspar districts in the United States and Pakistan, where microcline can occur with associated minerals in pegmatites and granitic rocks. The mineral is frequently found alongside others such as orthoclase and plagioclase within granitic systems, sometimes forming sizable, well-polished crystals ideal for display. Collectors value microcline for its color variety, crystal form, and the plug-in aesthetic of sunlit transparent faces that reveal interior clarity and micro-inclusions.
Collectors prize microcline for its versatility in rock and mineral collections: the color range, the potential for large, transparent crystals, and the way it complements other feldspars in mixed-suite specimens. Its presence in classic mining districts and its enduring display qualities make it a dependable choice for those building a focused or broad mineral cabinet.
