gem hardness scale

Gemstone Hardness Scale MOHS Hardness Scale The Mohs Scale of hardness is a chart of relative hardness of various minerals and resistance to scratching between minerals. #1 is the softest mineral and #10 is the hardest mineral. It is a relative scale, not proportional, meaning that a mineral with the hardness of 10 will not be twice as hard as a 5.

2/7 · Gemstones Hardness Chart of 185 gemstone types Gemstone Name Mohs Hardness Actinolite Cat's Eye Hardness 5.5 - 6 Agate Hardness 6.5 - 7 Agate Geode Hardness 6.5 - 7

The Mohs hardness scale is a relative measure of a mineral or gemstone's resistance to being scratched. As a principal tool in gemology, 

10/9 · The Mohs scale (pronounced MOZE) rates the hardness of gems and minerals. The hardness of a stone indicates the stone’s resistance to scratching or how the surface of the

Mohs Hardness Scale is based on 10 minerals, each of which is assigned an arbitrary value from 1 to 10. These minerals, along with their assigned value are: When interpreting Mohs Hardness Scale, it is common to assume that a diamond, for instance, the hardest mineral listed on the scale, is ten times harder than talc, which is the lowest.

Mohs Hardness Scale For Gemstones Seal Before Electroforming Gemstone Name Mohs Hardness Gemstone Family: Seal Before Electroforming Achroite 7.0 - 7.5 Tourmaline: Don't Have To Seal: Agate 7.0 Quartz: Don't Have To Seal: Alexandrite 8.5 Chrysoberyl: Don't Have To Seal: Almandine 6.5-7.5 Garnet: Seal: Almandine Spinel 8.0 Spinel

A 7 or higher on the Mohs scale usually indicates a gem is hard enough for normal jewelry use. This is a guideline, not a hard and fast rule. Pearls and opals are some of the most popular

Mohs Scale Ranking Chart. Diamond is the only mineral with a value of 10, being the hardest mineral. As the graph above shows, there is a large drop from 10 to 9 where the next hardest minerals are categorized (Ruby & Sapphire). However, the graph is not linear, Diamond is actually 3 ½ times harder than Ruby and Sapphire, which in turn are

MOH"S SCALE OF HARDNESS 10 Diamond 9 Corundum 8 Topaz 7 Quartz 6 Feldspar 5 Apatite 4 Fluorite 3 Calcite 2 Gypsum 1 Talc Choosing a selection results in a full page refresh. Press the space key then arrow keys to make a selection. Opens in a new

What is the Mohs Scale ? : The Mohs scale was developed by German mineralogist Friedrich Mohs and is a scale used by gemologists to classify a gem mineral's 

A brief introduction to the Mohs hardness scale for Gemstone Identification. Practical uses for identifying unknown crystals and gemstones.