You are born in Gemini – Mithuna Ascendant; so you should wear Emerald set in gold. Keep 4.25 carats (or ratti) as the weight. Don’t wear the gemstone on the little finger; wear it on the ring finger of right hand.
Diamond (Venus) the lord of your fifth house of Purva Punya can also be worn, along-with Emerald on the same ring finger. Suggested weight 4.25 cents.
Blue Sapphire (Saturn) as the lord of your ninth house of Bhagya and good luck. You can wear this on the second finger, set in steel. Weight 4.25 carat or ratti.
Wishing you good luck, may God bless you and above all?