DIAMOND

The ruling planet of this Gem/Stone is VENUS (Friday)

What you have to do:-

Donate - Donate a diamond or another colorless gem , silk clothes, dairy cream, yogurt, scented oils, sugar, cow dung, or camphor to a poor young woman on Friday evening.

Fasting - On Friday, especially during Venus transits and major or minor Venus  periods.

Mantra - "Aum dram drim draum sah shukraya namah." To be chanted on Friday at sunrise, especially during major or minor Venus periods.

This will help pleading Venus (Shukra) help in increasing riches and conjugal bliss.