Created in 1812 by the German geologist Friedrich Mohs, the Mohs scale rates the hardness of gems and minerals. A gemstone’s hardness determines its resistance to scratching. He chose ten minerals and assigned them numbers based on how easy or difficult they could be scratched by the other minerals. Today, this scale is an important tool to utilize while shopping for diamond or gemstone jewelry. A Mohs rating helps us identify a gem’s durability, and the more durable a gemstone the greater its longevity in a piece of jewelry that will be worn on a daily basis.
When consulting the Mohs scale, its important to remember that the gaps between the ten incriminates are not actually equal, even though they are evenly space on the scale. Diamonds are known for being one of the hardness substance on Earth, so hard, that they take the number ten position on the scale. Though only one seat away from corundum, diamond is actually 90 times harder in comparison. Corundum, which includes Sapphire and Ruby, is five times harder than Topaz which earns the rank directly below it.
Based on the Mohs scale, at Knox Jewelers we always recommend diamond or fancy colored diamond first in engagement rings or rings worn everyday. Falling in second place, Sapphire, Fancy Colored Sapphire and Ruby are durable enough to be featured in engagement rings or wedding bands. Sapphires are a great way to add a little contrast to your engagement ring, they are available in nearly every hue imaginable. Gemstones rated lower than a nine are not recommended for everyday rings, they could eventually become scratched or scuffed from daily wear.
Gemstones and their Mohs Rating
10 – Diamond, Fancy Diamond
8.5 – Alexandrite
8 – Topaz
7.5 – Aquamarine, Emerald, Morganite
7 – Amethyst, Garnet, Tourmaline
6 – Tanzanite
The Mohs scale and hardness are not the only factor to consider when buying gemstone jewelry, but it is an essential factor to help you understand how well that gem will survive years of wear. At Knox Jewelers, we want your ring to last several lifetimes, and choosing a proper gemstone could aid in that longevity.
If you have any questions about Mohs rankings or the jewelry creation process at Knox Jewelers, please be sure to let us know. We’re always happy to answer any questions you may have, and we look forward to working together with you to design a work of art that will last and be passed down throughout the ages. Contact our friendly and professional staff today, and we’ll get started on the journey of creating your very own, one-of-a-kind piece of custom jewelry.