Diamond is a 10 on the Mohs Hardness Scale and is four times harder than corundum ( sapphire and ruby) at nine. Topaz, at eight on the Mohs Scale, is half as hard as

The Mohs Scale – A List of Gemstone Hardness ; Bloodstone, 6.5 – 7 ; Onyx, 6.5 – 7 ; Moonstone, 6 – 6.5 ; Opal, 5.5 – 6.5.

The Mohs hardness scale measures the relative hardness of gemstones, as determined by their scratch hardness (the resistance of a mineral when scratched with a pointed testing object.) The diamond is the hardest natural gemstone in the world and measures a ten on the hardness scale.

We use the Mohs Scale of Hardness to calculate how hard our different gemstones are. Go Go. My Account; Login; Create a New Account; Shopping Cart; There are NO items in your shopping cart; Continue Shopping; Gemstone Hardness Scale . MOH'S SCALE OF HARDNESS . 10 . Diamond . 9 . Corundum . 8 . Topaz . 7 . Quartz . 6 . Feldspar . 5 . Apatite . 4

The Mohs scale of mineral hardness is a qualitative ordinal scale, from 1 to 10, characterizing scratch resistance of various minerals through the ability 

With a Mohs hardness level between 6.5 to 7.5, depending on their quality, Tsavorites have just begun their run of fame in the world of gemstones. So these are the gemstones that are famous around the world for their astonishing hardness level.

Any gemstone that, is approximately the hardness of quartz (7) is said to be 7 in hardness, but if it tests between two of the minerals on the scale, it is expressed by 1/2. Thus a gemstone that tests harder than quartz but softer than topaz is said to be 7 1/2 in hardness.

Mineral Gemstones · Chrysoberyl (hardness: 8.5 Mohs) Beryllium aluminum oxide · Corundum (hardness: 9 Mohs) Aluminum oxide · Diamond (hardness: 10 

1.48 Ct Rare! Gem Type: COLOR CHANGE GARNET. Hardness: 7.5 MOH's SCALE. Total weight and Stone sizemay slightly vary from piece to piece. Many inclusions shown are not visible to the naked eyes. Color may not ppear as exactly in real life due to variation between computer monitors.

Mohs Scale of Hardness Chart · 1 Talc · 1-2 Graphite, Molybdenite, Pyrophyllite · 1-3 Bauxite · 1-5.5 Limonite · 1.5-2.5 Sulfur · 2 Gypsum, Sylvite, 

5. Price. 3. Comfortable/Usable. 5. Mineralab Mohs' Hardness Test Kit for Industrial Application Rating. TIP: It is always good to know the Mohs hardness of your gemstones. One of these situations is when you want to cut your rocks or minerals. Knowing Mohs hardness helps you to choose the right tool.