I got this from beach and I really want to know what it is. Iam literally stumped because I am not getting any clue that what could be this . And one more notable thing is that this rock is super solid and hard unlike its appearance
And I think another test is heating test. If this stone breaks in 10 minutes after constant heating on high temperatures then it would not be a sapphire. Anyways I will try both methods.
Yes iam understanding what you are trying to say. I have recently checked that it was more harder than quartz and porclain/ceramic tile. I think it is a very low quality sapphire because it does not have any cleavage.