In that article, three Ohio diamonds, all found in the last century, were described: a stone found in Cuyahoga County, south of Cleveland, about 1870; an occurrence in Hamilton County about 1880; and a discovery in 1899 in Clermont County.

Natural diamonds are finite resources, and their availability can impact their value. Indeed, the lab-grown diamond market may have temporarily distressed the demand for natural stones, however the oversupply of man-made diamonds appears to have reached its apex and prices are now declining.

Lab diamonds cost a lot less than natural diamonds - typically a lab diamond will cost between 60% and 85% less than a natural diamond with identical carat weight and grades.

In most cases, a diamond has a resale value of 20-60% of the original price paid. For instance, if a new diamond costs $4,000, you'll likely be able to resell it for anywhere between $800-2,400, depending on a few factors.