We totally believe that a black jewel can instantly add oomph to any look! You agree, right? Luckily, there are several black gemstones available in the market today for you to choose from. And two of our favorites are black onyx and obsidian.
Join us today as we highlight the key differences between the two and answer the other frequently asked questions about these gems.
Differences between the onyx and obsidian gemstones
1) Definition
Black onyx: The black onyx is a semi-precious jewel known worldwide for its translucent to opaque surface. It gets its name from the Greek word ‘ὄνυξ’ which translates to ‘claws’ or ‘fingernails.’
Obsidian: The lesser-known jewel of the two, the obsidian is one gemstone whose fame is slowly gaining momentum in the fashion world. It can be found in several varieties and typically features a glassy surface.
2) Chemical structure
Black onyx: For the unaware, the black onyx is a type of silicate layered chalcedony which is a form of quartz.
Obsidian: Unlike its semi-precious gem counterpart, the obsidian is not a mineral. It is volcanic lava that has cooled off and turned into black volcanic glass.
3) Mining location
Black onyx: Currently, the gem can be found in different parts of the world including the U.S., Brazil, Pakistan, Yemen and Uruguay.
Obsidian: Similarly, obsidian is mined in different regions all over the world. This includes the Western U.S., New Zealand, Mexico, the Canary Islands, Armenia and Argentina.
4) Durability
Black onyx: This relatively durable jewel features a 6.5-7 rating on the Mohs scale of mineral hardness. That makes timeless onyx ring perfect pick for spicing up your celebratory attires.
Obsidian: This gemstone is slightly less durable and has a 5 out of 10 rating on the Mohs scale.
5) Birthstone month
Black onyx: One of the most common questions we receive is ‘whether or not the black onyx is a birthstone?’ It is! For the uninitiated, the onyx is the December month’s birthstone.
Obsidian: The jewel, on the other hand, is the November birthstone.
Did you know?
- Black onyxes were often used to control a person’s sexual impulses.
- When broken, the obsidian forms very sharp edges. Due to this, the stone was commonly used as a weapon during the Stone age.
Also Read: How to Identify a Real Black Onyx?
black onyx vs obsidian FAQs
- What is the spiritual meaning of black onyx?Spiritually, the black onyx is considered to be the stone of protection and fortune. Having said that, there is no scientific evidence that backs the jewel’s ability to do the same.
- Are obsidians rare?Yes, pure black obsidians are quite rare. This is because the majority of stones found in nature today contain inclusions that give them a reddish, yellowish or brownish tint.
- Are black onyxes treated?The majority are! Due to their exceptional rarity, most of the black onyxes currently sold are actually gray chalcedonies that have been heat-treated to gain the required hue. That said, do note that as these gems share the same chemical structure as their natural counterparts, they are considered to be 100% authentic.
- What level of gemstone cleavage does the obsidian have?Obsidians do not have any gemstone cleavage. That makes high-quality promise rings studded with onyx suitable for wearing on a daily basis.
