When Does Blue Nile update their inventory?

[RosadoRock]

Hi All,

I'm new to PriceScope and new to the world of diamond purchasing so forgive me if I say anything dumb.

I am constantly checking sites like Blue Nile to find the right diamond engagment ring for my girlfriend. I'm looking at their list of diamonds based on the specifications i'm looking for and I notice that when I find a diamond I want, it gets sold fairly quickly. So to avoid being beat in making a purchase, I was wondering if anyone knew how often Blue Nile updates their list? Several times a day? Daily? few times a week?

Thanks