Big as my fist. Eats sandpaper. Weighs almost 7 lbs considering the fact that I can still hold in the palm of my hand. I'm going to go to a jeweler to have them checked out along with the others. Will update.
Use what ever color. Corundum (ruby/sapphire) are of the same hardness.
Correct, Quartz has no cleavage, I don't see any cleavage on your specimen. But, well, we've been wrong before....Once...
So you tested it with the diamond tester you said you ordered and it passed.
The largest diamond ever found weighed 1.6 pounds. so you think you found one that is 4.4 times larger than the largest diamond on record? What you have is a 7 pound quartz, not a diamond. https://en.wikipedia.org/wiki/Cullinan_Diamond
Since the OP has not commented any further on his last post is probably wise lol. If he has found a 7 pound diamond he is fabulously rich now and does not need the info. hitting social media.
Are you saying pictures from the first and the second set of posts are from the same rock as the third picture ? If you have a 7 pound diamond, why did you risk damaging it to knock off all those pieces.
Can you help us with this one? It would be helpful if you would re-post this pic with a scale of some sort on a neutral gray background. The fabric the stones are on masks some of the interesting features of the specimens. It looks like denim and, if that's true, those stones are pretty small. Still, intriguing. I'm especially fascinated by what looks like step marks on the one on the right. Also, they are amazingly clear ... can't tell about the crystal structure. Are they octahedrons?
Where did you find these? You don't indicate where you are from and, unless that is central Arkansas, I have serious doubts about finding any diamonds, much less a 7 pound specimen in the U.S.
The other pictures are quartz ... a close relative to the diamond if you consider being stones from the earth as a close relationship.