Can I prove a diamond is real by scratching plain glass?
What could the stone be if it cuts glass and is not a diamond?
About Me
ALES LOMBERGAR is one of the few artisans in Europe who still practice the ancient art of glass acid etching which flourished in the late 19th century. Decorations are applied with resin resists by hand and then exposed to acid baths, with no machinery used. More information here.Recent in portfolio
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BlindPoet
on November 30th, -0001
There are lots of minerals that will scratch glass. Look up “mohs glass” on google. Not very hard, is it? Cubic zirconium and moissanite, both looking very diamond-like in appearance, will scratch glass.
NoName
on November 30th, -0001
Some types of glass can scratch glass.There are several ways for a layman to test a crystal for properties of a diamond.The easiest is to draw a straight ,thin,dark line on a sheet of white paper.Place the diamond on the line preferably about one quarter of the stone must protrude on the other side of the line.Look at the line through the diamond from above.You should not be able to see the line inside the diamond.It is not foolproof but should work 9/10 times.
If the stone is without flaws there is another way but doing it wrong can damage the stone.Heat the stone with a flame making sure that no oxygen gets to the stone(use gas and the stone must be in the center of the flame to exclude oxygen)When the stone is hot it can be picked up with a hot tweezers and dropped into sulfuric acid(watch out for the gas and splash)Anything other than a flawless diamond will crack and disintegrate into a very course powder.
DawnsAwaken
on November 30th, -0001
There are a lot of minerals that scratch glass that are not diamonds. One of the most common mineral at earth, quartz, scratch the glass. Mohs scale of mineral hardness was defined by Frederich Mohs (1773-1839), that compared the hardness of several minerals. The softer it is talc and the harder diamond. Glass has a relative hardness of 6 (some people say 6 to 7). At present there are nearly 3000 different types of named minerals. Their number is always increasing – in fact, in average, 20 to 30 more new minerals are discovered every year. It is almost impossible to list all minerals that are harder than glass, that are not diamond.
Titianna
on May 19th, 2010
I am wondering though. I’ve heard that scratching glass with a diamond has the potential of damaging the diamond. How could this be if diamonds are supposed to be the strongest stones out there?
Van
on October 9th, 2015
At last, somneoe comes up with the “right” answer!