How much did a 1 carat diamond cost in 1960?

I'm curious to know, how much would one have to pay for a 1 carat diamond back in the year 1960? It's fascinating to see how the prices of precious gems like diamonds have fluctuated over time, and I'm eager to get a sense of what they were valued at in the past. Could you please provide me with an estimate or a range of prices that a 1 carat diamond might have cost in 1960? I'm really interested in understanding the historical context of diamond pricing.