The cost of a 1-carat diamond in 1960 would have varied significantly depending on several factors, including the diamond’s quality, cut, color, and clarity, as well as market conditions and location.

In the early 1960s, a 1-carat diamond of average quality (lower color and clarity grades) might have been purchased for a few hundred to a few thousand dollars. Keep in mind that these prices are very approximate and are based on historical records and general trends.

The diamond market has evolved significantly over the years, and the prices of diamonds have generally increased over time due to factors such as inflation, changes in consumer preferences, and increased demand for diamonds. The introduction of the 4Cs (cut, color, clarity, and carat weight) grading system by organizations like the Gemological Institute of America (GIA) in the mid-20th century has had an impact on diamond pricing, as it provides a more standardized way to evaluate and price diamonds based on their quality.

For a precise historical price of a 1-carat diamond in 1960, you might want to look at historical records, price guides, or appraisers who specialize in vintage jewelry. Keep in mind that the value of a diamond can also vary significantly based on its unique characteristics and the specific market conditions at the time of sale.