Rhodochrosite Vs. Rhodonite

Rhodochrosite is a popular gemstone composed of manganese carbonate.^[1] Rhodonite is also a popular gemstone and its chemical composition is manganese silicate.^[2]

Quick Facts on Differences of Rhodochrosite and Rhodonite

For a quick recap of the differences rhodochrosite and rhodonite:

• In terms of crystallography, rhodochrosite can be hexagonal or trigonal while rhodonite is triclinic.
• For chemical formulas, rhodochrosite is MnCO3 while rhodonite is MnSiO3.
• While both rhodochrosite and rhodonite can be vitreous, in terms of luster, rhodochrosite can be pearly and rhodonite can be dull or greasy.
• Rhodochrosite streaks white while rhodonite streaks colorless.
• While both rhodochrosite and rhodonite can be commonly pink or red, rhodochrosite is often brown.
• Rhodochrosite's hardness is lower than rhodonite - rhodochrosite ranges from 3.5 to 4 and rhodonite ranges from 5.5 to 6.5 on the Moh's scale.
  • Rhodochrosite can be scratched by the average knife blade (4.5) or glass (5.5) while rhodonite can not be.

Quick Facts on Similarities of Rhodochrosite and Rhodonite

The similarities of rhodochrosite and rhodonite include:

• Rhodochrosite and rhodonite both can be opaque, translucent or transparent.
• Rhodochrosite's rarity is similar to rhodonite.
• Rhodochrosite's specific gravity overlaps with rhodonite - rhodochrosite ranges from 3.4 to 3.6 and rhodonite ranges from 3.57 to 3.67.

Summary of Rhodochrosite

Rhodochrosite is a beautiful mineral that is known for its pink to red color and its unique banded pattern. It is a carbonate mineral that is composed of manganese, calcium, and carbon. Rhodochrosite is often found in veins associated with silver, lead, and copper ores. It is typically formed in hydrothermal veins and can be found in a variety of locations around the world, including Argentina, Peru, South Africa, and the United States.

Summary of Rhodonite

Rhodonite is a mineral that belongs to the pyroxenoid mineral group and is known for its distinctive pink color. It is often found in metamorphic rocks, especially in manganese-rich environments. It has a hardness of 5.5 to 6.5 on the Mohs scale and a specific gravity of 3.4 to 3.7. Rhodonite is named after the Greek word "rhodon," which means rose, in reference to its pink color.

Table Comparison of Rhodochrosite vs Rhodonite