A sweet spot in the compromise between size and price, diamonds around the 0.70-ct mark make great engagement ring stones. A diamond budget of about $2,000 can get you a fine diamond at this weight.

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.

In general, diamonds do not increase significantly in value over time. Outside of a small number of rare or colored diamonds, the vast majority of diamonds have decreased slightly in value over the last few years, making them a poor investment from a price appreciation perspective.

Lab-grown diamond prices have generally fallen over time as the technology and techniques used to produce lab diamonds have improved, and competition among manufacturers has increased. 2023 was no different, with lab-grown diamond prices continuing to decline rapidly.