This is my personal favorite of the lot, with sharp and very GEMMY, lustrous crystals to 4.5 cm perched atop matrix. The piece jus sparkles, with minute crystals all over the place. Very minor meyerhofferite threads are present, but only within the crystal cores and not on the outside of the crystals as with other pieces here. The crystals are so gemmy that you can look right through to the matrix. It is just a spectacular example of a very rare species, large, aesthetic - and undamaged. MUCH BETTER In PERSON.