金属层（4）由莫氏硬度为3以下的金属形成。
The metal layer (4) is made by metal which murray rigidity is less than 3.
根据莫氏硬度表，人类牙齿的硬度比黄金大但比黄铁矿小。
Human teeth are harder than gold but softer than pyrite, according to the Mohs Hardness Scale, which categorizes how easily minerals scratch.
环锤式碎石机(重型锤破机)适用于莫氏硬度五级以下的脆性物料的破碎。
Ring hammer hammer (heavy hammer breaking machine) suitable hardness and brittleness's category below the broken material.
其莫氏硬度为9度，非常适合日常佩戴因为它是所有彩色宝石中最耐久的，并且十分的美丽。
It has a Mohs rating of 9 and is excellent for daily wear as it is the most durable of the colored gemstones, combined with great beauty.
氧化铬5.2比重2.5莫氏硬度，增强摩擦力，因为高价格因而在世界的大多数地方不流行的。
Chromium Oxide Specific gravity 5.2, Moh hardness 2.5 Enhances friction, but not popular because of high price in most parts of the world.
氢氧化铝比重2.4莫氏硬度3。比磨料加得更多的填充物。有衰退趋势，但耐磨性好。将抛光对偶。
Aluminum Oxide Specific gravity 2.4 Moh hardness 3. More a filler than an abrasive. Tends to fade, but has good wear resistance. Will polish the opposing surface.
钻石，是对莫氏硬度标度10，这意味着他们不仅是最困难的矿物质，但它们实际上是地球上最困难的实质内容。
Diamonds are a 10 on the MOHS Hardness Scale which means that they are not only the hardest mineral, but they are actually the hardest substance on earth.
钻石，是对莫氏硬度标度10，这意味着他们不仅是最困难的矿物质，但它们实际上是地球上最困难的实质内容。
Diamonds are a 10 on the MOHS Hardness Scale which means that they are not only the hardest mineral, but they are actually the hardest substance on earth.
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