Extinction Angles

| View Cart ⇗ | Info

“Positive and negative extinction angles in the feldspars.” -Johannsen, 1908

Galleries

Crystals

Source

Albert Johannsen A Key for the Determination of Rock-Forming Minerals in Thin Sections (New York, NY: John Wiley & Sons, 1908)

Downloads

TIFF (full resolution)

1415×2400, 303.8 KiB

Large GIF

603×1024, 39.2 KiB

Medium GIF

377×640, 21.1 KiB

Small GIF

188×320, 9.4 KiB