â¢ Apply primer to any knots or resin pockets on the trim. â¢ Let the primer dry, and then begin masking all adjacent surfaces with painter's tape. Be sure to seal the edges firmly. â¢ Wipe down the surface with denatured alcohol or a paint deglosser then prime the entire surface with a stain-blocking primer.
K-feldspar and plagioclase feldspar Feldspars have two cleavage planes that intersect at 90Â°. Fragments of pure feldspar crystals thus tend to form rectangular blocks with irregular ends. Feldspars have vitreous lusters and occur in opaque shades of white to gray to pink to very dark gray.Other rarer colors are also possible! The feldspars are divided into two main groups: Potassium feldspar (K-spar) and plagioclase (plag).-feldspar and plagioclase feldspar Feldspars have two cleavage planes that intersect at 90Â°. Fragments of pure feldspar crystals thus tend to form rectangular blocks with irregular ends. Feldspars have vitreous lusters and occur in opaque shades of white to gray to pink to very dark gray.
  Feldspar is a group of common, rock-forming minerals with 19 member species. These minerals are mostly colorless, white, off-white, light brown or gray, but one can find â¦ almost any color among the feldspar members.Certain potassium-rich feldspars may be a salmon to pink color.A certain variety of the mineral microcline called amazonite is turquoise to greenish blue. A certain variety of the mineral anorthite called labradorite is nearly black with a dark blue, green, red and gold sheen or iridescence (schiller).The well-known moonstone is another variety of some of the feldspar minerals with its pale to creamy color and iridescence. Feldspar is a group of common, rock-forming minerals with 19 member species. These minerals are mostly colorless, white, off-white, light brown or gray, but one can find â¦ almost any color among the feldspar members.