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Ok, I am fairly sure that a diamond is not prerequisite to cut glass.I am sure that very hard steel will do the job just as well.It may be that only a diamond can cut or cleave a diamond though...well..a diamond tipped cleave !.....but then...now that I think about it.....that also may not be the case as you generally would cleave a diamond along a natural fracture...and so would not need to have a diamond tipped cleave.Still, as far as the original question is concerned..........no...........hardened steel will do the job.....I've seen it done a few times.Scribe a channel then split it !!
I don't wish to disagree with the Uber Jim Bob but I thought that the Mohs scale is not a scale of relative hardness but just a scale of what is hard displayed is scale form.ie: I think the gap between the hardness of a diamond and a corundum is far far more than the gap between the hardness difference between a corundum and Topaz !..and so on and so forth !!
There is something called the Mohs hardness scale. It is a list of minerals in a ralative sense of hardnessThe list is as followsHardness Substance or Mineral1 Talc2 Gypsum2.5 to 3 pure Gold, Silver3 Calcite, Copper penny4 Fluorite4 to 4.5 Platinum4 to 5 Iron5 Apatite6 Orthoclase6 Titanium6.5 Iron pyrite6 to 7 Glass, Vitreous pure silica7 Quartz (Crystallized silica)7 to 7.5 Garnet7 to 8 Hardened steel8 Topaz9 Corundum10 Diamond>10 Aggregated diamond nanorodsAnything from 7 up can cut glassThere is a little ambiguity in that the minerals listed are the ones used to define the scale. Others can be used interchangeably. One, corundum, for instance, is a ruby if it is red, a sapphire if it is blue.There are other details we of the Illuminati know about this subject but are loath to share with the huddled masses.So There, Karen - (big raspberry)
I don't wish to disagree with the Uber Jim Bob but I thought that the Mohs scale is not a scale of relative hardness but just a scale of what is hard displayed is scale form.
AFIK juwelers do not use scratching properties (=hardness) to see the difference between cubic zirconia (or "zircon" as they call it) and diamond, but density. They use a special balance and determine weight and "under water weight".
This is assuming that a zircon is hard enough to cut glass, again that is my poorly constructed question - is the zircon hard enough?
Hi fretack,Are you saying that those diamond lookalikes "cubic zirconia " will also cut glass? Does this mean that someone could be wearing a ring made of cubic zirconia, scratching glass and not knowing that an unscrupulous jeweler has just sold them a "fake"?
Why thank you, JimBob...I am but one of the huddled masses, working his tail off to be educated in the arts of the Illuminati.
I have heard that one way to tell zirconia from diamond is that diamond, being a much better conductor of heat, feels cold if you put it against your lip. I don't think I'd like to have to bet on this technique.