Dale Armstrong's Gem Profile- Patterned Jaspers

Gem Profile- Patterned Jaspers

by Dale Armstrong

This article is one of a five-part series on Jasper. Here is a complete list of our Jasper articles: What is Jasper?, Bloodstone, Picture Jasper, Patterned Jasper, Beautifully Colored Jasper.

Learning more about the different types of jasper that are used most often by wire jewelry artists, we now look at those that are named for living organisms.

I am very familiar with the jaspers that have been around for a while, like Dalmatian, Leopardskin, and so on, but to research this subject I had to do some serious hunting to make myself aware of the very long list of "new" names for certain jasper patterns. Obviously some of the older, more well-known names make total sense, while other more recent names made me shake my head over what some people will do to try to sell a product. It seems that whenever a vendor doesn't know the real identity of a stone made into beads these days, they call it a jasper and give it their own name, often based on what it looks like or what they think will appeal to the potential buyer.

When the microcrystalline silica lapidary material we know as jasper formed so there are included needle-like crystals of different minerals in a radial structure, it is called Orbicular Jasper. Probably the most popular variety is Ocean Jasper. The tale behind this beautiful stone, as told to me by a geologist years ago, is quite amazing. In the early 1900s, it seems that pieces of this stone had been found along a beach in Madagascar and made their way to market only occasionally. The actual source was unknown and when it was sought, it was to impossible to find! A cartographer was hired to make a map of the Madagascar coastline and when the plane he was flying in was very low, he saw outcrops of an unusual rock in the water during low tide. When he went to the location on land, he no longer could see the rocks because the tide was high. Speaking with local fishermen, he hired one with a boat. When the tide was low again they made their way out to chip specimens of this rock to properly identify it.

Orbicular Jasper, often named "Eagle Eye," wrapped by Barbara Wolf

Two years ago while visiting one of my favorite lapidary friends, John Bajoras, at the Tucson gem shows, a few freeform cabochons caught my eye. Now you have to understand that I pride myself on keeping up with "what's out there" in the world of rocks and I had never seen this material before! It looked like an agate, but the coloring was "almost" like Ocean Jasper. When I asked what it was, John laughed and said I had a "good eye" and then told me that it was very old stock, some of the first Ocean Jasper that had ever been found in Madagascar. Naturally I bought all that he had, and shared it with some of my wired friends. This material really does look like an agate. It is translucent and has vugs (cavities) of botryoidal crystals.

Freeform cabochons of original Ocean Jasper from Madagascar. Private collection, Dale Armstrong

and

Ocean Jasper cabochons cut by Charlie Armstrong showing vugs filled with quartz crystals.

Also called "Fish Eye" jasper and "Sea" jasper, in color shades of green, orange and pink through brick red from hematite or iron, yellow from goethite and white-quartz, Ocean Jasper is a lovely stone that is very popular with wire artists. Mining at the original location on the Ambolobozo Peninsula of Madagascar was done by using only hand tools from boats during low tide, because the country is concerned with the ecology of their beautiful coastline. The sad news is that in 2006, the mine totally played out and the only "real" Ocean Jasper that comes to market today is from stores of the material that the country smartly put back for future exporting and occasionally locals still find it along the beach.

A selection of Ocean Jasper cabochons. Private collection, Dale Armstrong

If you find a material that is called "ocean" jasper but it is from another part of the world, be aware that it is not real ocean jasper, rather another orbicular jasper that resembles the original material like Rainforest Jasper from Australia. This volcanic rock is actually a spherical rhyolite (containing feldspars) that is silicified material, qualifying it to be classified as a jasper.

A 7-pound chunk of Rainforest Jasper rough, similar in looks to Ocean Jasper. Private collection, Dale Armstrong
Rainforest Jasper Heart wrapped in brass and copper wire by Gina Smith

Several other names that you may be familiar with, are also forms of orbicular jasper.

Poppy Jasper is the name given to the beautiful variety that is mainly found in Santa Rita County, California. Also known as "flower" jasper, the best specimens feature vivid images of poppy-like flowers on a brown matrix in realistic colors of yellow, red, green, and white. Other locations for poppy jasper include Australia, south Africa, and Oregon (USA). Today, other flower names are also used for orbicular and mottled jaspers, such as: Rose and Chrysanthemum.

Poppy Jasper cut and wrapped in 21-gauge Argentium wire by Beverly Brown

Leopardskin Jasper has spots that resemble those on a wild cat, in similar colors of black, yellow, brown, tan, grey and whites. Because this jasper also contains feldspar minerals, it is actually a type of Rhyolite, as are many in the "jasper" group. Depending on the placement and color of the "spots" sometimes this jasper form is also called "Eagle Eye"; however, there is no "hawk's eye" (reserved for a type of tiger-eye we will discuss in the future).

Leopardskin Jasper Pendant wrapped by Joan Madouse
Leopardskin Jasper pendant and earrings wire wrapped by Judy Copeland
Leopardskin jasper cabochons cut by Charlie Armstrong, pendant wrapped by Dale Armstrong

As you may already be aware, there are many other animal and vegetable names used to sell jasper and rhyolite lapidary items today including Tiger-skin, Zebra, Elephant-skin (aka Script stone), Spiderweb and Snakeskin, each resembling the colors and pattern of the living organism it was named for.

Carved Zebra Jasper Pendant from Becky Davis

A few other names for patterned jasper are:

Paint Brush: today this name is used for any jaspers that have a pale colored background with bright splashes and slashes of color through it. The original name is "Indian Paint Rock" found in Nevada where the light brick-reds ("Indian" reds) are often accompanied by dendrite ferns, trees, and shrubbery.

Chinese Painting Jasper wrapped in Argentium Wire by Becky Davis

Rainbow: a "new" name for multi-colored jasper usually in hues of orange, browns, grey and black.

Parrot Wing: found in the Mexican state of Nayarit, this lovely jasper of greens and blues separated by fine lines that resemble feathers, does remind one of a beautiful tropical bird! Warning: "chrysocolla jasper" is NOT the same as Parrot Wing! Although it may be similar in colors, most of what is called "chrysocolla jasper" on the market today is dyed. Tip: if the piece is very expensive it might really be jasper whose copper mineral content explains the colors.

Mottled green jasper earrings created by WS Faculty member Albina Manning. Maybe Rainforest?

Resources

Print Resources:

Peterson Field Guide to Rocks and Minerals by Frederick H. Pough, ISBN-0-395-91096-X
The Audubon Society Field Guide to North American Rocks and Minerals by Charles W. Chesterman and Kurt E. Lowe, ISBN 0-394-50269-8
Internet Resources:

minerals.usgs.gov/minerals
www.wikipedia.org