Fire1981 Posted February 11, 2023 Report Share Posted February 11, 2023 Weird Opal or a Conquer 🔥 1 Link to comment Share on other sites More sharing options...
akroorka Posted February 11, 2023 Report Share Posted February 11, 2023 Umm-- stresss fractures in a Vitro---kinda weird just imho. Marble-On!! Link to comment Share on other sites More sharing options...
Newton Posted February 12, 2023 Report Share Posted February 12, 2023 5 hours ago, akroorka said: Umm-- stresss fractures in a Vitro---kinda weird just imho. Marble-On!! Is your comment in reference to the parallel surface marks in the third photo? Is that what all “stress fractures” generally appear as? Are they more common in certain makers than in others? Link to comment Share on other sites More sharing options...
Fire1981 Posted February 12, 2023 Author Report Share Posted February 12, 2023 Yes those are stress fractures or anneal fractures that happen for various reasons usually associated with temperature change or getting dropped and beat up. 🔥 Link to comment Share on other sites More sharing options...
wvrons Posted February 12, 2023 Report Share Posted February 12, 2023 Not a opal. Annealing fractures are when the marble cools to fast right after being made. After machine made marbles are made they need to cool slowly for at least four to twelve hours to even touch by hand. If they cool to fast they will fracture. Fractures also happen when two or more different kinds of glass have a coefficient to far apart. You cannot just mix all glass. Fractures happen from impact, they are glass marbles. Fractures happen from gas pockets in marbles. Fractures can happen with a fast wide temperature change. 1 1 Link to comment Share on other sites More sharing options...
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