See price schedule for cost of larger sizes.
|
SHONKINITE, IG-125. Cost A. California. Medium to coarse grained dark brown mica, pink feldspar and pale green pyroxene. SYENITE, IG-130. Cost A. California. Medium to coarse grained tan to reddish alkali feldspar with up to 5% mafics. NEPHELINE SYENITE, IG-130A. Cost A. Canada. Medium to coarse grain nepheline with 5 - 1 0% pyroxene, biotite and minor plagioclase in 1- 5 mm grains. HORNBLENDE SYENITE, IG-130B. Cost A. Canada. Very coarse grain, about 50% reddish to brown alkali feldspar. SYENITE PORPHYRY, IG-130D. Cost A. Nevada. Spectacular. With euhedral orthoclase phenocrysts in aphanitic yellow- brown alkali feldspar groundmass. TONALITE, see under DIORITE TRACHYANDESITE PORPHYRY, IG-135. Cost A. California. Known as "Table Mountain Latite". Vitreous plagioclase laths to 1 cm in dark gray, aphanitic ground. TRAP, see BASALT TUFF, IG-140. Cost A. California. Light pinkish buff, fine grain. A few 2-10 mm or larger lapilli (brown) and up to 3 mm conspicuous grains of quartz. LAPILLI TUFF, IG-140A. Cost A. California. Fine grain, gray, various colored lapilli around 1 cm and up. WELDED TUFF, IG-140B. Cost A. Colorado. Light gray, compact, fine grain. Lapilli to 1 cm. TUFF, IG-140C. Cost A. California. Quartz and glassy feldspar (1-2 mm grains) in light pinkish lavender, fine grain ash. TUFF, IG-140D. Cost A. California. 5-15 mm light gray lapilli and scattered glassy 1-2 quartz in fine gray ash. TUFF, IG-140E. Cost A. California. White, fine ash with 1-5 mm quartz and dark brown lapilli to 2 cm. WELDED TUFF, IG-140F. Cost A. California. Pinkish brown with 1-2 mm glassy feldspar, quartz and other volcanic fragments. WATER LAID TUFF, IG-140G. Cost A. California. Pale greenish white, fine grain, stratified. WELDED TUFF, IG-140H. Cost A. California. Resinous, red-brown, inter- laminated with black obsidian. 2x3 largest size. TUFF, IG-140I. Cost A. Nevada. Light buff, medium grained, somewhat friable, lapilli to about 15 mm. TUFF, IG-140J. Cost A. Nevada. Grayish lavender, medium grained with a few larger fragments. WELDED TUFF, IG-140K. Cost A. California. Abundant 1-2 mm glassy quartz and feldspar grains in a gray, fine grain matrix. WELDED TUFF, IG-140L. Cost A. Nevada. Reddish brown, eutaxitic lapilli. 1-2 quartz, plagioclase, sanidine to nearly 1/3 of rock in a devitrifted matrix. RHYODACITE WELDED TUFF, IG-140M. Cost A. Nevada. Spectacular. Abundant broken crystals of quartz, sanidine, plagioclase, biotite and hornblende in highly deformed, flattened glass shards and lapilli. Shards are from black to brown and give the rock a laminated look. |