Oh, this is one pretty ring!
9ct white gold, citrine, and diamond ring.
Metal: 9ct white gold stamped (9k) & (BJB 375 London)
Stones: Citrine 1.65ct & diamond TDW 0.05ct
Weight: 2.65gm
Condition: new (in excellent pre-loved condition)
Manufacturing standard: Medium 
Let me know if you want more details or to see the valuation.