- Brand
- Natural Pigments Pigment (see all 157 pigments)
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- Natural Pigments (5 products)
- Medium
- Dry pigment
- Pigments
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NBk6 ●●
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- Specific Gravity
- 1.03–1.10
- Hardness
- 2
- Refractive Index
- 1.59–1.64
- Description from the manufacturer
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A transparent brown to black-brown mineral pigment used in tempera, oil and watercolor mediums, obtained from natural asphaltum deposits in Utah. Gilsonite, also known as uintahite or asphaltum, is a bitumen-impregnated rock (asphaltite) mainly found in the Uintah Basin of Utah and Colorado, United States. It is a naturally occurring solid hydrocarbon bitumen. Although it occurs also in other locations, its large-scale production occurs only in the Uintah Basin. Our gilsonite, or North American Asphaltum is a natural, resinous hydrocarbon found in the Uintah Basin in northeastern Utah. This natural asphalt is similar to a hard petroleum asphalt and is often called a natural asphalt, asphaltite, uintaite, or asphaltum. Gilsonite in mass is a shiny, black substance similar in appearance to the mineral obsidian. It is brittle and can be easily crushed into a dark brown powder.
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