Mountain Blue
This pigment code can refer to genuine Azurite in rock form (or the greener Malachite) which has been ground or the pigment may refer to the synthetic versions. Azurite may go by many different names including Blue Bice. Azurite pigment in its natural form is rare in artist paints. At times, Natural Pigments makes Azurite oil paint, however it is seldom available. We've been able to find Azurite in oil form from a company called Gazo, which offers several different grades which correspond to different colors of blue. It is not always clear when a paint is made from Azurite whether it is the natural or synthetic version. We also have an entry in the pigment notebook for the Synthetic version, Bice.

Azurite can come in a bright blue variety. With Azurite, the particle size is also related to the shade. This is Gazo's Azurite Pura in oil paint
In general, PB30 is not well suited to oil binders, and it is reported that this pigment may discolor in oil. This pigment is given a toxicity rating of B, meaning it does have toxicity, so do handle this fascinating pigment with caution. It also contains copper. The Artist's Guide to Health and Safety has more information about the hazards associated with copper pigments.

Another grade of Azurite offered by Gazo in oil paints. This paint is called Azurite bis Azura (contrast with their brighter Azura Pura)
The fineness of the grind will affect the overall color, so take care not to over-grind it. Gettens describes the larger particles as "deep violet blue in color." While it has a high refractive index and can be beautiful, the larger particles also contribute to the coarse or grainy texture.

Azurite Pura from Gazo.

Azurite bis Azura by Gazo
Azurite is affected by oil, so research this carefully if you choose to use it in oils. The work of Michael Price contains more on this topic. Sometimes Azurite turns black in oil and other times it turns green, so care is needed in handling specialty historical pigments such as this one.

Blue Bice often refers to a synthetic form of Azurite. This Blue Bice is from Natural Pigments
The synthetic version, Bice has its own pigment page in the Pigment Notebook.
PB30 Azurite pigment data from David G. Myers, The Color of Art Pigment Database, [Artiscreation.com](https://artiscreation.com/other.htmlPB30 Azurite)
Information about PB30 Azurite from Bruce MacEvoy, Handprint Guide to Watercolors, General information about this class of pigments from Handprint
CAMEO Materials Database: Conservation & Art Materials Encyclopedia Online, Museum of Fine Arts Boston. (Accessed June 2025). [Azurite](https://cameo.mfa.org/wiki/Azurite, https://cameo.mfa.org/wiki/Azurite). Museum of Fine Arts Boston.
CAMEO Materials Database: Conservation & Art Materials Encyclopedia Online, Museum of Fine Arts Boston. (Accessed June 2025). Blue Bice https://cameo.mfa.org/wiki/Blue_bice. Museum of Fine Arts Boston.
Kremer Pigmente (Accessed June 2025). Azurite "Michael Price" https://www.kremer-pigmente.com/elements/resources/products/_files/10201-10208e.pdf. Kremer Pigments.
Reactive, sometimes turns green in oil (not always). May darken
Thought to be ASTM I but may react in various media. May turn green - closely related to Malachite. Thick layers of oils may also discolor. Michael Price and others have done more extensive research on how to use Azurite as well as treatments to the pigment particles for use in painting. While not related to lightfastness, it is sensitive to acids, sulfur in the air, alkalis (warm), and Hydrogen sulfide.
Transparent
Hazard, Use more caution
Please consult the relevant health and safety authorities for the hazards of using Azurite. Azurite contains copper, and Monona Rossol’s work has some information on the hazards of copper pigments.
Low-Medium
Fast
Varies
Basic copper carbonates, Natural basic carbonate of copper
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