It is named for the Scottish chemist Thomas Thomson. The crystal system of thomsonite is orthorhombic. The Mohs hardness is 5 to 5.5….
| Thomsonite | |
|---|---|
| Crystal class | Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) |
| Identification | |
| Color | colorless, white, beige, and pink |
| Cleavage | perfect on {010}; good on {100} |
Is Thomsonite an agate?
Thomsonite is actually internal reflections from copper inclusions (additional minerals trapped within the gemstone). U.P. Thomsonite is formed in a similar process as agates, trapped air pockets within volcanic basalt fill with prehnite (mineral base of U.P. Thomsonite) and microscopic bits of copper.
Where can I find Thomsonite in Minnesota?
Grand Marais
This form is most well-known at Thomsonite Beach at Grand Marais, Minnesota, on the shoreline of Lake Superior. It usually forms in association with other zeolites and green Chlorite. Thomsonite is named in honor of Scottish mineralogist and chemist Thomas Thomson.
Where is Thomsonite in Michigan?
Thomsonite is sometimes found on Isle Royale and in the Keweenaw Peninsula of Michigan.
What is Thomsonite worth?
The typical value range of these thomsonites is anywhere from $5 to $20 per gram, according to Keith. The three main factors that account for the price of this gem are linear fractures, “eyes”, and greenish hues.
What rock is pink?
A rock-forming mineral with a pink or pinkish color is almost certainly feldspar.
What is pink Larimar?
Because its texture was very similar to the green-blue pectolite variety Larimar produced in the Dominican Republic, the stone was also misrepresented with the trade name “pink Larimar.” These stones had orange-pink to brownish pink color with white zoning and showed a botryoidal or radial crystal habit (figure 1).
Can you find geodes in Minnesota?
Minnesota is known for its agates, predominantly found in the Lake Superior region or Moose Lake; however, you can also find geodes, gold, fossils, amethyst, yooperlites, and much more sedimentary igneous and metamorphic rocks. The most famous gravel pits are the Hatchery Pit, Soo Line Pit, and the Airport Pit.
Where is float copper in upper Michigan?
The largest known piece of float copper in the world merely looks like an enormous rock sitting on a mound of grass. The sign next to it is unassuming and, when people are driving around Presque Isle Park in Marquette in Michigan’s Upper Peninsula, it’s easy to miss.
How do you find a Datolite?
Some white and green types of datolite are translucent. Small specks of copper may appear as inclusions, commonly near the surface of the nodules. Inclusions of native silver and cuprite also have been noted. The color patterns may be mottled, gradationally zoned, or even dendritic.
What are the characteristics of Thomsonite?
An interesting habit of Thomsonite is as rounded, concentric band s, which are polished into aesthetic rounded stones. This form is most well-known at Thomsonite Beach at Grand Marais, Minnesota, on the shoreline of Lake Superior. It usually forms in association with other zeolite s and green Chlorite.
Is thomsonite a rare mineral?
Thomsonite is a rare collectible mineral and is especially important to zeolite collectors. Radiating, banded Thomsonites from Michigan are often tumbled and polished, and may be used as minor jewelery objects such as beads.
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