Banded Calcite VS Onyx | What’s The Difference


Banded Calcite and Onyx are both popular ornamental stones. Each stone has unique properties that make it an attractive choice for decorating homes and creating jewelry. However, many factors, such as hardness, color, transparency, and cost, must be considered when considering which to use.
In this article, we will tell you about the following:
What is Banded Calcite?

Banded Calcite is a sedimentary rock composed of calcium carbonate (CaCO3). Its distinguishing feature is the presence of thin layers or “bands” of varying colors, typically white, cream, yellow and brown. Banded Calcite often forms in limestone beds and can be used as a decorative stone for many applications, including jewelry and construction.
What is Onyx?

Onyx is a cryptocrystalline form of quartz, composed mainly of silicon dioxide (SiO2). It typically has a black or brownish-black color which can also contain layers or “veins” in different colors. The beauty of Onyx makes it a sought-after ornamental stone. Onyx is used to make jewelry and other decorative items, as well as in construction and architectural designs.
Color of Banded Calcite and Onyx:
Banded Calcite is often found in various colors, including white, cream, yellow, and brown. Onyx typically has a black or brownish-black color, sometimes containing veins in different colors.
Chemical Composition: (Banded Calcite VS Onyx)
The chemical formula of Banded Calcite is CaCO3, and Onyx is composed mainly of SiO2. Some other differences between the two stones are as follows:
Comparison | Onyx | Banded Calcite |
---|---|---|
Color | Black, White | red, orange, yellow, green and more |
Chemical Composition | SiO2 | CaCO3 |
Crystal System | Trigonal | Trigonal |
Density | 1.1 g/cm3 | 2.71 gm/cc |
Diaphaneity | Translucent | Transparent to translucent |
Hardness (Mohs scale) | Seven ( 7 ) | Three ( 3 ) |
Luster | Vitreous | Vitreous |
Melting point | 145°C | 300 °C |
Refractive Index | 1.54 – 1.55 | 1.658 and 1.486 |
Specific Gravity | 2.70 | 2.71 |
Where To Buy | Buy Now | Buy Now |
Geologic Occurrence: (Banded Calcite VS Onyx)
Banded Calcite is typically found in limestone beds and can form through various means, such as evaporation or precipitation. On the other hand, Onyx usually occurs as nodules in sedimentary rock and takes millions of years to form.
Transparency: (Banded Calcite VS Onyx)
Banded Calcite is translucent, meaning it allows light to pass through. Onyx is opaque, which means it does not allow any light to pass.
Healing Properties:
The Healing Properties of Banded Calcite and Onyx are as follows:

Banded Calcite:
Banded Calcite is known to relieve stress and anxiety and boost self-esteem. It is also said to increase focus and concentration and promote emotional stability.
Onyx:
Onyx is beneficial for improving mental courage, reducing fears, and increasing the overall strength of will. It can also improve alertness, help one become more grounded, and increase fertility.
Price of Banded Calcite and Onyx:
Banded Calcite is typically less expensive than Onyx. However, Due to its limited availability, Onyx may cost up to twice as much as Banded Calcite. In contrast, Banded Calcite can be found in various locations, and the price varies depending on the quality of the stone and the amount purchased.
Uses of Banded Calcite and Onyx:
The uses of Banded Calcite and Onyx are as follows:
Banded Calcite:
Banded Calcite is often used as an ornamental stone in jewelry and other decorative applications. It can also be used in construction projects, such as floors and countertops.
Onyx:
Onyx is used in jewelry and other decorative items, as well as in construction and architectural designs. It can also be used to make objects such as carvings and sculptures.
Banded Calcite and Onyx are both popular ornamental stones with unique properties, making them attractive choices for decorating homes and creating jewelry.
Banded Calcite VS Onyx: Which is better for you?
The decision of which one is better depends on cost, color, hardness, transparency, and healing properties. Banded Calcite may offer a more economical option if the price is an issue. However, if the desired color or clarity of the stone is important, then Onyx might be a better choice. Additionally, if the healing properties of the stones is an important consideration, then both Banded Calcite and Onyx can offer benefit in this regard. Ultimately, it is up to you to find the best option for yourself based on your personal preferences and needs.
With this information in mind, you can decide which stone best suits your needs. Whether you choose the colorful Banded Calcite or the darkly beautiful Onyx, you’re sure to have a unique and beautiful piece of art.