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Showing results for tags 'hardness'.
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Metopolychas posted a topic in Fossil PreparationAnother air scribe question. I'm looking at scribes and after some reading I've understood there's two main types based on how they function. Don't remember the words but one types was 'push lever' or something and the other i can't remember at all. The point is that one is kinder to the rock than the other. My local stone is mostly limestone (some of it mildly metamorphosed) and shale. Shale I know is defined as soft rock, but what does limestone sort under? I have a hard time doing any prepping with hand tools, and most of the best fossils are found in the lime. So my question is
Gravel Monkey posted a topic in Questions & AnswersI was recently given some coprolite to polish for a friend. I was wondering if anyone knows what the general hardness would be as it relates to Mohs scale. Thank you
Fun Infographic on Sandblasting Media and Material Hardness
Vaniman posted a topic in Fossil PreparationMade this quick reference guide as a fun little graphic to aid in sandblasting matrix. Hopefully, someone finds this useful! Enjoy!
Granton Material Hardness
Ptychodus04 posted a topic in Fossil PreparationDoes anyone know the Moh's Scale hardness for the shale/slate from the Granton Quarry? I have a prep that is going to require abrasive for the whole thing. The matrix just laughs at soda, so I'm on the hunt.