Jade Silver

I inherited a silver tea service that i believe was made in Japan. It was given as a wedding present to my mother in 1950 but i don’t know when it was made. She referred to as a “Jade” silver noting it was not the purity of sterling. I can’t find any reference for Jade silver and was hoping some one could shed some light.

I will photograph and attach in response to any reply received.

Thank you.