Mineral-pigment watercolor is watercolor made with pigments processed from naturally occurring minerals, suspended in a binder so they can be rewetted and painted. In my studio, I use the full Daniel Smith PrimaTek range on Arches 300 gsm cold-press watercolor paper. The colors are vivid, deeply granulating, sometimes unexpectedly sparkling, and capable of building phenomenal layers.
And they are so much fun to paint with!
A stone has to surrender its familiar shape to become paint. It is crushed, processed, milled, joined with a watercolor medium. The mineral no longer looks like a specimen, but it has not entirely forgotten what it was.
What Makes PrimaTek Watercolor Different?
Daniel Smith introduced PrimaTek in 1998 with lapis lazuli. According to the company, a mineralogist sources minerals that are processed into pigment and milled into watercolor. The current collection includes 36 colors, among them Amethyst Genuine, Sodalite Genuine, Kyanite Genuine, Hematite Genuine, and Rhodonite Genuine.
These are commercially manufactured artist paints. By the time they reach my studio, the minerals are waiting inside their tubes, ready to become flowers and wings and strange sea creatures.
I use the entire range because each pigment behaves a little differently. Some settle heavily into the paper. Some separate into soft fields of color. Some carry a glint that appears only when the page turns toward the light.
One small caution: “mineral watercolor” can be a loose marketing phrase. Check the pigment information before assuming a color was actually made from its namesake stone. Here, I am speaking specifically about Daniel Smith PrimaTek paints and the manufacturer’s documented process.
Before Buying Tubes, Try the Watercolor Dots!
This is the advice I would give any artist who is curious about PrimaTek: start with the Daniel Smith watercolor dot cards.
They are inexpensive compared with buying a pile of full tubes, and you can try an entire range of colors first. Add water to each little dot, make a swatch, test a pale wash, let it dry, and add another layer. You will quickly discover which colors make you want to keep painting.
Daniel Smith’s Mineral Marvels Mini Dot Card Set contains samples of all 36 PrimaTek colors across nine small cards. The larger Daniel Smith dot card includes PrimaTek alongside its other watercolor lines. It is such an easy, low-commitment way to see the granulation, texture, and sparkle for yourself!
Why Do Mineral Watercolors Granulate?
Granulation happens when pigment particles settle unevenly as a wash dries. On textured paper, heavier particles gather in tiny valleys while other areas remain lighter. The result can look like weather passing across stone, sediment collecting at the bottom of water, or a map that appeared by itself overnight.
The Gemological Institute of America explains that naturally derived inorganic pigments can retain variations in particle size and structure. In watercolor, those differences can become visible as texture. You can read more about the long relationship between mineral pigments and art in GIA’s Gems on Canvas.
Daniel Smith describes PrimaTek paints as especially granulating, and I notice it immediately when I layer them. The first wash establishes a kind of mineral weather. Later washes deepen it without completely covering what happened underneath.
What Are They Actually Like to Paint With?
The short answer: vivid, thirsty, and a little unruly!
Many PrimaTek colors are much stronger in mass tone than you might expect. When I want a pale wash, I use a lot of water. More than I think I need, then sometimes a little more. That dilution lets the pigment travel without turning the passage too dark too quickly.
The layering is phenomenal. One wash can dry into a field of texture, and the next can move through it like another current. Instead of flattening the earlier color, the layers begin to collect history.
Some colors also have little flashes of sparkle. I truly did not think I would like that. Sparkle sounded a bit too deliberate, too decorative. Then I saw it on the paper.
It arrives quietly, visible from one angle and gone from another, more like mica caught in a riverbank than glitter scattered over a surface.
Now I love it!
Why I Use Arches Cold-Press Paper
I paint on Arches 300 gsm cold-press watercolor paper. It has enough texture to give granulating particles places to settle while still allowing detailed drawing and controlled layers.
Arches says its watercolor paper is gelatin-sized to the core, helping preserve luminosity and transparency. The 300 gsm weight accepts substantial water, important when a vivid mineral color needs to become a very light wash.
Paper is not merely the floor beneath a painting. It participates. With PrimaTek, the little hills and valleys of cold press become part of the image.
Where These Pigments Appear in My Work
I have used PrimaTek watercolors in Crystalis, in my recently completed Cartography of a Flower, and in the floral jellyfish painting currently unfolding on my table.
I will not assign individual mineral colors to those works from memory and accidentally turn a palette into fiction. As I document each piece, I will photograph the tubes, swatches, and painted details together so the materials remain traceable.
Finished works and stories can be explored in the Mythos & Alchemi Art Prints collection as they enter the archive.
Are PrimaTek Paints Worth Trying?
If you enjoy visible texture, layered washes, pigment movement, and colors with strong personalities, yes! They may feel less predictable if you want broad, perfectly even passages, but I think their unpredictability is part of the point.
Start with the dots, water, patience, and a scrap of the paper you intend to use. Make a dark stroke, pull it outward into a pale wash, let it dry, then add another layer.
Tilt the paper. Look closely. Come back when the light changes.
My Daniel Smith recommendations are completely unpaid. I recommend these paints because I genuinely use them, all of them, and because stone becoming color still feels faintly impossible even while I am watching it happen.
Somewhere between the mineral specimen and the finished painting, the earth becomes fluid for a little while. It moves through water, rests inside paper, and learns another way to hold light.