The "Swatch This" Challenge Day 7

Technical Data:

Pigment: PV 15 | Series: 1
Lightfastness: I – Excellent
Transparency: Transparent
Staining: 2-Low Staining
Granulation: Granulating

ULTRAMARINE VIOLET

This granulator flows freely and leaves a mottled effect if misted. Ultramarine Violet is low-staining  but extremely lightfast. This is another of the 12 Colors of Inspiration HAND POURED Watercolor Half Pan Set from DANIEL SMITH who says that Ultramarine Blue pigment is baked to create Ultramarine Violet.
​What does it mean to bake a color? Artificial Ultramarine  also known as French ultramarine is made by heating a ground mixture of China clay, soda ash, coal or wood, charcoal, silica and sulfur in a furnace and maintained high heat for an hour and cooled. When cool, it is washed to remove excess sodium sulfate, dried and ground to a fine powder. Synthetic Ultramarine is not as permanent nor as vivid as true Ultramarine, which comes from Lapis Lazuli and far more expensive to make. 

NATURAL VS. SYNTHETIC PIGMENTS
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Natural pigments come from a variety of sources including precious stone and even bugs. Some come from inexpensive things like charred wood, but some come from much more expensive and rare elements. Over time, there are more and more synthetic substitutes for the rare pigments.
The terms used for Natural and Synthetic confuse me, so I have included them here to help make sense of them.

Organic pigments refer to synthetic/chemical pigments. 

Inorganic pigments = natural pigments