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The third hardest gemstone is ruby and then the fourth hardest is emerald.
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∙ 12y ago
Wiki User
∙ 12y agoEmerald
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What is the hardest metal in the world?
Osmium is one-third as hard as quartz. Tool steels are one-fourth as hard as osmium. Chromium has a oxide layer harder than corundum if dry and sputtered.
What is the second hardest natural substance on earth?
The hardest substance that is naturally occurring is a diamond. However, there are harder substances that have been made by scientists in labs.
What minerals make up either rose quartz or amethyst?
Actually, Quartz IS a mineral itself. It is one of the hardest there is. (fourth hardest on the most common hardness scale.)
What is the third and fourth largest islands in the Philippines?
Negros island in the Visayas is the third largest island in the Philippines, after Luzon and Mindanao.
What is the title of someone who studies gems?
A gemologist studies gems.
Is stpm one of world's hardest exam?
its the third hardest exam in the world
What is the answer to the third level on the hardest test on the iPhone?
What's the answer to hardest test on Phone
What is the hardest metal in the world?
Osmium is one-third as hard as quartz. Tool steels are one-fourth as hard as osmium. Chromium has a oxide layer harder than corundum if dry and sputtered.
How are the third and fourth ventricles linked?
The third and fourth ventricles are linked by the aqueduct of Sylvius .....
What is the hardest metal?
Osmium is one-third as hard as quartz. Tool steels are one-fourth as hard as osmium. Chromium has a oxide layer harder than corundum if dry and sputtered.
Was Thomas Jefferson the third or fourth president?
Jefferson was the third president, James Madison was the fourth.
Is one third equivalent to one fourth?
No, one third is more than one fourth
How much larger is one fourth than one third?
a fourth is 8% smaller then a third
What word does not belong first second third fourth fifth?
fourth
Where are the gems for the castle hunt in build a bear ville?
you can find the fourth gem if you go on the ferry
Who was the third and fourth oldest man in the bible?
Noah and Adam are the third and fourth oldest men in the Bible
Is Earth on the third or fourth closer to the sun?
third
