When exploring gemstones and crystals, many people often wonder: Are tourmaline and obsidian the same stone? They may look similar at first glance, especially in their black varieties, but these two stones are very different in origin, composition, and meaning. This guide will walk you through what tourmaline and obsidian are, what they are used for, and which one might be better for you.
What is Tourmaline?
Tourmaline is a crystalline gemstone that belongs to a complex family of silicate minerals. Unlike single-coloured stones like sapphire or ruby, tourmaline stones are known for their incredible colour variety. They can be pink, green, red, blue, or even multicoloured. One of the most famous examples is watermelon tourmaline, which shows both pink and green in the same stone.
On the Mohs hardness scale, tourmaline measures 7 to 7.5, which makes it strong enough for everyday jewellery. Tourmaline is mined worldwide, with large deposits found in Brazil, Mozambique, Nigeria, and the United States.
It’s not just prized for its beauty. Tourmaline has also been popular in jewellery markets because of its versatility. According to the Gemological Institute of America (GIA), the demand for coloured gemstones like tourmaline has grown steadily, with the global gemstone market projected to surpass $50 billion by 2030.
What is Obsidian?
Obsidian is not a crystal but a volcanic glass. It forms naturally when lava cools so quickly that crystals do not have time to form. Because of its origin, obsidian has a glassy texture and can appear black, green, brown, or even rainbow-like depending on mineral inclusions.
Obsidian is softer than tourmaline, usually measuring around 5 to 5.5 on the Mohs scale. This means it scratches more easily and is not as durable for daily wear in rings or bracelets. However, it has been used for centuries for spiritual and practical purposes. Ancient civilisations like the Mayans even used obsidian for making arrowheads and tools because of its sharp edges.
Are Tourmaline and Obsidian the Same Stone?
The short answer is no. Tourmaline and obsidian are completely different stones in terms of formation, structure, and use.
-
Tourmaline is a mineral crystal that forms through geological processes over time.
-
Obsidian is a volcanic glass that forms rapidly during volcanic eruptions.
While black tourmaline and black obsidian may look similar, tourmaline is generally more durable, often transparent to translucent, and used widely in jewellery. Obsidian, on the other hand, is opaque, glass-like, and usually used in decorative items, spiritual tools, or beads.
What is Tourmaline Used For?
Tourmaline is primarily used in jewellery because of its durability and colour variety. You can find it in rings, necklaces, earrings, and bracelets. Specific types of tourmaline stones are more desirable:
-
Paraiba tourmaline, glowing neon blue and green, can fetch over $10,000 per carat.
-
Rubellite tourmaline, with its rich red hues, is also highly valuable.
Beyond jewellery, tourmaline is sometimes used in technology due to its pyroelectric and piezoelectric properties—it can generate an electric charge under pressure or heat.
In spiritual practices, tourmaline is believed to provide grounding and protection. Black tourmaline, in particular, is often used as a shield against negative energy.
What is Obsidian Used For?
Obsidian has been used throughout history for both practical and symbolic purposes. Because of its sharpness, ancient cultures used it for blades, mirrors, and tools. Today, it is still polished into decorative items and jewellery, though it is less durable for everyday wear compared to tourmaline.
Spiritually, obsidian is associated with truth and protection. Many people believe it helps reveal hidden emotions and provides clarity. Rainbow obsidian and snowflake obsidian are especially popular in crystal healing communities. (note this is not advice for you to use crystals for healing that is your choice but personally I don't believe in that.)
Which Stone Should You Have: Tourmaline or Obsidian?
The answer depends on what you are looking for.
-
If you want a durable gemstone for fine jewellery, tourmaline is the better choice. Its hardness, colour range, and long-lasting value make it ideal for rings, necklaces, and investment pieces.
-
If you are more interested in spiritual or decorative uses, obsidian is a strong contender. It is affordable, widely available, and deeply rooted in cultural traditions.
For jewellery that lasts, tourmaline wins. For affordable and symbolic pieces, obsidian is a wonderful alternative.
Conclusion
Tourmaline and obsidian are not the same stone. Tourmaline is a crystalline mineral known for its stunning colours and durability, while obsidian is a volcanic glass valued for its symbolism and history. Both have unique benefits depending on what you want: tourmaline for lasting jewellery and investment, obsidian for affordability and spiritual meaning.
FAQ’S
Is black obsidian the same as black tourmaline?
No. Black obsidian is volcanic glass, while black tourmaline is a mineral crystal. They may look alike but are very different in composition and durability.
Which is stronger, tourmaline or obsidian?
Tourmaline is stronger, ranking 7–7.5 on the Mohs scale, while obsidian is 5–5.5.
Is tourmaline more expensive than obsidian?
Yes. Tourmaline can cost anywhere from £50 to thousands per carat, while obsidian is generally very affordable.
Can obsidian be worn in jewellery?
Yes, but it is softer and can scratch or chip easily, so it’s best used in pendants or beads rather than rings.
Which stone is better for protection, obsidian or tourmaline?
Both are said to provide protection, but black tourmaline is often considered the strongest grounding stone in crystal healing practices.