The stone in your image appears to be a yellow sapphire, also known as Pukhraj (पुखराज in Hindi).
Here are a few identifying points based on what I see:
Color: It has a clear, bright yellow tone — typical of a yellow sapphire.
Clarity: The stone looks transparent with good luster.
Cut: It’s oval-shaped with smooth facets, a common cut for Pukhraj gemstones.
Placement: You’ve placed it on cotton, which is often done to keep it safe from scratches — people usually do this with valuable gemstones.
💎 Astrological info: Yellow sapphire (Pukhraj) is associated with Planet Jupiter (Guru) in Vedic astrology. It’s believed to bring wisdom, prosperity, good health, and luck when worn with proper guidance.