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Dwarves' Earth Treasures Museum:
Coyamito Agates
Rancho De Coyamito, Chihuahua Province, Mexico
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.    Even they have been known since 1960s, Gem Shop Inc. recently started mining the Coyamito agates. It turns out that the typical colors are red, pink and light blue to purple colors, and any solid agates showing strong banding and strong colors are somewhat rare. I have gone through barrels of Coyamito agates and most are hollow and filled with quartz. The classic color combos would be purple & yellow combo, and orange & yellow combo with strong shadowing effects. The Coyamito agates are also well known for their excellent pseudomorphs (aragonite crystals replaced by colorful agate). It must be pointed out that some similar agates from other nearby locations such as Aparejos and Demasche agates may be mixed with coyamitos.

YOU CAN CLICK ON THE PICTURES FOR LARGER PICTURES

Rough Appearance: Smooth almond shapes with small pittings. Skin colors are brown, dark green and light green.
Hollow reddish agates are common, can be confused with rounded Laguna agates.
Typical Coyamito Agates Unusual colors
Another typical Coyamito Agates With Psuedomorph after calcite
With Shadowing Effect
Rare blue to purple color combos With Shadowing Effect
Rare black and red color combo Rare black and red color combo
cut from the same broken nodule as one on the left.

Spray of Psuedomorphs, SLAB

You can see the Coyomito Agates for Sale at the Online Agate & Thunderegg Shop