Did you get any other gems ruby zircon sapphires etc where you found them. If not then it looks like quartz crystals to me. You can also take them to any jeweler that does valuations and appraisals of the values of stones . Just ask them to see if they are diamonds they will tell you soon enough.
Ended up in hospital twice in three weeks from the heat. Went into congestive cardiac failure with fluid overloads in the feet and lungs and around the heart. Back to normal now. Have to take 2x40mg lasix a day to keep the fluid down and the failure at bay.Have not felt better in years now...