Diamond is the street name for some of the San Marcos homes. Redfin often puts Stonegate homes under Woodbury. The best way to tell is by year built and price. If built in 2011 or later, less than high 900's and detached, it must be Stonegate.

Woodbury residents do have the option to send kids to Stonegate elementary unless they change that.

I would avoid going to Irvine high school. Most of Irvine ghettos feed into Irvine high (cross-reference with the prior post on Irvine's housing stock).

I would rank the High schools in this order:
Tier 1:
University
Northwood

Tier 2:
Beckman
Woodbridge

Tier 3:
Irvine
Tustin high school