May 8, 2023

Purple Fluorite vs Amethyst: Discover the Differences

Learn about the differences between purple fluorite and amethyst to choose the perfect gemstone for you. A comprehensive guide awaits!

Purple Fluorite vs Amethyst

Are you in search of a gemstone that can add some sparkle and color to your life? Look no further than purple fluorite and amethyst!

Both of these stones are known for their beautiful shades of purple, but how do they differ?

Here, we will compare Purple Fluorite and Amethyst and highlight their unique features.

Composition and Color

Purple fluorite and amethyst may share a similar color, but their composition and origin are quite different.

A. Composition of Purple Fluorite

Purple fluorite is a mineral composed of calcium and fluoride (CaF2). It is often found in cubic or octahedral crystal forms, and its purple hue is caused by the presence of trace amounts of manganese.

B. Composition of Amethyst

Amethyst is a variety of quartz (SiO2) that gets its purple color from the presence of iron and aluminum impurities. The deeper the purple, the more iron is present in the crystal.

C. Comparison of Composition

The primary difference in composition between purple fluorite and amethyst is that purple fluorite is a calcium fluoride mineral, while amethyst is a variety of quartz. Both minerals have different crystal structures and impurities that give them their unique properties.

D. Comparison of Color

Both purple fluorite and amethyst exhibit various shades of purple, but there are differences in the tone and intensity of their color. While purple fluorite can have a lighter, almost lavender-like hue, amethysts can range from pale lilac to a deep violet.

When it comes to choosing between purple fluorite and amethyst, it’s important to consider the composition and color that best suits your needs.

As Thomas Farley, President of the Gemological Institute of America, explains: “The choice between purple fluorite and amethyst depends on the individual’s personal preference for color, and their intended use for the gemstone.”

Physical Properties

The physical properties of gemstones are important to consider when determining their suitability for various purposes.

A. Mohs Scale of Hardness

One factor to consider is a gemstone’s hardness, which is measured on the Mohs scale. Purple fluorite has a Mohs hardness of 4, making it relatively soft and vulnerable to scratches and chipping. Amethyst, on the other hand, has a Mohs hardness of 7, making it more durable and suitable for everyday wear.

B. Specific Gravity

Another important physical property to consider is specific gravity, which measures the density of a mineral. Purple fluorite has a specific gravity of 3.18-3.25, while amethyst has a specific gravity of 2.65.

C. Cleavage and Fracture

Cleavage and fracture are also important properties to consider. Purple fluorite has a perfect cleavage in four directions, meaning it breaks easily along flat surfaces. Amethyst has a conchoidal fracture, meaning it breaks into curved, shell-like pieces.

D. Other Physical Properties

Other physical properties to consider include transparency, luster, and refraction. Purple fluorite is generally transparent to translucent and has a vitreous (glassy) luster. Amethyst can range from transparent to opaque and has a vitreous to resinous luster.

It’s important to consider the physical properties of gemstones when selecting them for various purposes, such as jewelry-making or spiritual practices.

As gemologist Antoinette Matlins notes: “It is essential to understand the properties of each gemstone you select, as they have different strengths and weaknesses. This will help you choose the right gemstone for your needs.”


The formation of gemstones can tell us a lot about their properties and characteristics. Let’s take a closer look at how purple fluorite and amethyst are formed.

A. Formation of Purple Fluorite

Purple fluorite is formed through hydrothermal processes, where hot water and minerals mix together to create deposits in veins, often in association with metallic ores. The purple color is caused by the presence of manganese ions, which replace calcium ions in the crystal lattice.

B. Formation of Amethyst

Amethyst is formed in the cavities of igneous rocks, such as granite, or in hydrothermal veins. The purple color is caused by the presence of iron ions, which replace silicon ions in the crystal lattice. Natural irradiation and heat can also influence the color and formation of amethyst.

C. Comparison of Formation

While both purple fluorite and amethyst are formed through hydrothermal processes, they have different host rocks and conditions that affect their formation. Amethyst is often found in geodes, where it grows in a cavity filled with gas bubbles, while purple fluorite forms in veins with metallic ores.

Uses and Applications

Both purple fluorite and amethyst have been valued for their beauty and metaphysical properties throughout history. Let’s explore their various uses and applications.

A. Purple Fluorite

Purple fluorite is often used in lapidary work, such as gemstone carvings and cabochons. Its striking color and relative softness make it a popular choice for jewelry-making. It is also used in industrial applications, such as in the production of aluminum and fluorine compounds.

In the metaphysical world, purple fluorite is believed to enhance intuition and spiritual awareness. According to crystal healer Judy Hall, purple fluorite is a powerful aid for meditation, helping to clear the mind and enhance spiritual connection.

B. Amethyst

Amethyst is one of the most popular gemstones, prized for its deep purple color and durability. It is often used in jewelry-making, such as in rings, necklaces, and bracelets. Its popularity has led to synthetic amethyst being produced as well.

In the metaphysical world, amethyst is believed to have a calming and balancing effect on the mind and emotions. It is often used to aid in meditation and spiritual practices. According to crystal healer Katrina Raphaell, “Amethyst opens and activates the crown chakra, connecting us to higher spiritual realms and our own higher self.”

C. Comparison of Uses and Applications

While both purple fluorite and amethyst have similar metaphysical properties, their uses and applications in the physical world differ. Purple fluorite is more commonly used in lapidary and industrial applications, while amethyst is a highly prized gemstone for jewelry-making.

How to Choose Between Purple Fluorite and Amethyst

Choosing between purple fluorite and amethyst can be a difficult decision, as both gemstones have their own unique characteristics and beauty. Here are some factors to consider when deciding which gemstone to choose:

A. Color and Appearance

The most obvious difference between purple fluorite and amethyst is their color. While both gemstones have a purple hue, the shade and saturation can vary. Amethyst typically has a deeper, richer purple color, while purple fluorite may have a softer or more muted tone. Consider which color and appearance you prefer when making your decision.

B. Hardness and Durability

Another factor to consider is the hardness and durability of the gemstone. Amethyst has a hardness of 7 on the Mohs scale, making it a durable gemstone that can withstand everyday wear. Purple fluorite, on the other hand, has a lower hardness of 4, which makes it more susceptible to scratches and damage. If you are looking for a gemstone that can withstand regular wear and tear, amethyst may be a better choice.

C. Price and Availability

Price and availability can also be factors to consider. While both purple fluorite and amethyst can vary in price depending on the quality and size of the gemstone, amethyst is generally more widely available and can be more affordable than higher quality purple fluorite specimens. Consider your budget and what you are willing to spend when making your decision.

D. Metaphysical Properties

If you are interested in the metaphysical properties of gemstones, both purple fluorite and amethyst have their own unique energies and uses. Consider what specific properties you are looking for and which gemstone aligns with your intentions.


In conclusion, There’s no one right answer when it comes to choosing a gemstone. It’s a matter of what appeals to you, what you’re looking for, and what you can afford.