. Bulletin - New York State Museum. Science. 98 NEW YORK STATE MUSEUM Hauynite Na2Ca()Al2(Si04)3 Hauynite is a sodium, calcium and aluminium orthosilicate with some sodium sulfate, Hauynite occurs in glassy rounded isometric crystals and grains of a blue to green color in igneous rocks and lavas. Lazurite (lapis lazuli) Na4()Al2(Si04)3 Lazurite is an orthosilicate of sodium and aluminium with sodium sulM. It occurs in deep blue masses and rarely in isometric crystals. Lazurite was formerly used as a natural pigment, producing the deep blue color known as ultramarine; it has now
. Bulletin - New York State Museum. Science. 98 NEW YORK STATE MUSEUM Hauynite Na2Ca()Al2(Si04)3 Hauynite is a sodium, calcium and aluminium orthosilicate with some sodium sulfate, Hauynite occurs in glassy rounded isometric crystals and grains of a blue to green color in igneous rocks and lavas. Lazurite (lapis lazuli) Na4()Al2(Si04)3 Lazurite is an orthosilicate of sodium and aluminium with sodium sulM. It occurs in deep blue masses and rarely in isometric crystals. Lazurite was formerly used as a natural pigment, producing the deep blue color known as ultramarine; it has now been almost entirely superseded by the artificial product of that name. Garnet RnsBra2(SiOJa Garnet is an orthosilicate of the general formula RII3RIII2 (Si04)3 in which Rn may be calcium, magnesium, ferrous iron, or manganese and R111 aluminium, ferric iron or chromium, rarely titanium. The varying proportions of these elements give rise to numerous varieties, the principal types of which will be dis- cussed under " ; Garnet crystallizes in the normal group of the isometric sys- tem. Fig. 216-18 show the common types of crystals. It occurs. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept
Size: 1555px × 1607px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887
