RE: Artifacts and Tumor Cells

Will note those arrows on future posts :P
The 1st slide, those 3 box shaped transparent crystals forming a triangle looked like calcium oxalate.

the second slide is the exact center where you see a cloud of pink cells made up of different smaller round and darker shade of pink circles. Those darker circles are their nucleus and they vary in sizes. If you look at the 7 o'clock position you would see a large round circle which has a space out around, that space is the cytoplasm and it looks "foamy" because it's a macrophage eating up the debris or reacting to the surrounding inflammation.