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Granite intrudes with its hottest leading edge forming cassiterite, tin. The copper sulfides form second, chalcopyrite is the primary copper ore formed in quartz. Third would be cobalt, nickel and arsenic. Then the zinc-lead zone, with zinc sulfide as sphalerite ore, lead sulfide as galena ore, than silver. Finally, the iron rich zone with iron carbonate as siderite ore, the dominate mineral of the world. COBALT. native is a pale violet-magenta color. Cobaltite is a native
mineral ore, cobalt arsenic sulfide, it's an opaque cool magenta color.
PB28 oxides of cobalt and aluminum = Cobalt Blue TIN OXIDE is black and fires white, mix tin oxide and cobalt oxide with heat and you get cerulean blue. You can get a similar blue by mixing and firing tin and copper chalcanthite with quartz sand like the Egyptians did, this made their highly prized frit colors, which they traded through the Phoenician's, ancient-world-wide. Smelt tin ore and copper ore and you'll get bronze. Bronze is the metal the Egyptians made their saws out of to cut the limestone and for their great pyramids. Salts of metals categorize themselves in color, nickel is green, copper is blue, cobalt is rose and anhydrous blue, chromium is yellow to dark red and iron is from yellow and red to brown. This note is taken in my color theory of rim and centering colors in elements. 5.Calcinated
COBALT COBALT turns black with sulfur. COBALT Oxide is black, calcinated it becomes cobalt blue, fired in potash glass it becomes smalt, a popular early Roman color. COBALT blue today is a mixture of cobalt oxide, aluminum oxide and titanium white, not the same color and not really necessary to the palette. When a color can be mixed using two pigments, you don't need it, but it could be handy as in the brighter Ultramarine Blue. COBALT violet is a very important cool magenta, [cobaltous phosphate] by Bocour, New York, is the best I've ever seen, there is also a German cobalt violet dark, [cobaltous oxide arsenate] if they still make it. COBALT salts with potassium nitrite make the color aureolin yellow. SULFUR will turn all lead colors black, also tin, copper, cobalt,
cadmium's, manganese, arsenic and antimony.
cobalt aluminate blue spinel It matches the ancient color of Azurite. Cu3[C03]2[0H]2, a copper idiochromatic color. Azure can easily be made with copper phthalocyanine blue and a good ultramarine blue or a little cobalt violet [magenta]. In fact with a cobalt violet, [the cool magenta], you won't need ultramarine blue, you can make it. One way or the other, Azure is a beautiful color that nature uses often. Cobalt- Oxides and native, Magenta [MMMM] and cool magenta [MMM1/2C], natural or calcined to Ult.Blue [MMCC]. Cobalt Co 27 --- Metallic silver pink element.
Crystal 14,
MANGANESE, deep transparent red pigment color that lightens to Cadmium
Red opaque. The Ruby is Cadmium Red transparent.
ALUMINUM, adds yellow sometimes, enhances other elements. CHROMIUM, allochromatic chromium, which gave the red to rubies gives spinel a real kick in the red mass dark, and it never leaves the red spectrum color. COBALT, bright blue, with allochromatic cobalt, it does well here in aluminum's opposite second home.
Crystal 28,
IRON, Yellow allochromatic. COPPER, "Iceland Spar", Cyan, allochromatic, polarizing filter. COBALT, "Sphaeroc Cobaltite", standard Magenta Cool,#5, [MMMM], allochromatic.
earth quanity Cobalt .002 PB28 oxides of cobalt and aluminum = Cobalt Blue MMMM, Bocour, New York, Cobalt Violet Phosphate, Transparent dual-toned,
10_5_22
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