You are currently in the dasa of Jupiter. It continues till 2037. Jupiter is a lord of a Trine and placed in a Quadrant creating a Raja yoga by itself. It is a Vargottama planet and has good Shadbala. However in the Bhava chart, it shifts to the 3rd bhava where it is generally not comfortable.
As such, the only gemstone worth considering now would be for Jupiter — A yellow sapphire set in gold with back open to let the rays pass through to the skin.