My future Mother in Law used to "dabble" in the jewelry business so I went to her when searching for a diamond for her daughter for an engagement ring. She recently went to a jewelry show and found what she considers a "great deal" I did not have the time to run down to look at the stone and the vendor would not allow her to take it so I had to make a decision...we pulled the trigger. I am told this is a GIA certified 1.75 Carat SI1 diamond. Based on my lack of knowledge and limited research, I'm reading mixed reviews of SI1 clarity diamonds. The diamond is a cushion cut and will be set in an 18 Karat gold ring with a halo with approximately another .75 Carats of diamonds. Is this a good cut/quality for an engagement ring? Thank you