Escape room "Priceless Gift"

Your beloved GRANDMOTHER PASSED AWAY and left you something SPECIAL in her will...a DIAMOND NECKLACE from the 18th century! The only problem is that it's somewhere in her home and she DOESN'T REMEMBER where she hid it. The executor of the will SOLD the home and the new owner will take ownership. You have ONE HOUR to FIND the necklace before the new owners get to take possession of the home and everything in it.