Natural diamond 0.14 CT Si2
The exact parameters of the diamond can be seen on the certificate (photo number 4).
The certificate confirmed by the Polish Gemological Society's appraiser, along with a net valuation of $400 USD. 492 USD gross.
The upward dynamics of diamond prices, due to the extremely expensive mining and declining deposits, is maintained at a strong, stable level.
At a dollar exchange rate of 4.4 PLN, the gross value of a diamond is 2164.8 PLN.
Estimated price based on the USD/PLN gross exchange rate calculated in the range of PLN 4.4-5/1USD (the PLN 5 barrier was crossed in September 2022, then according to economists there was an upward adjustment).