You can do whatever you want as long as both are set in the same metal and not touching. Sapphires are corrundums which have a higher strength and resistance to scratching, whereas an amethyst has a slightly lower Moh scale rating of softness at 7... read more
If they touch, the sapphire will wear away the quartz. If they are separately set in the SAMe metal, 18k to 18k or platinum to platinum or 10k to 10k, then it doesn't matter. There will be greater abrasion on the facets and table of the amethyst is you wear them both regularly. Not a huge difference unless you are talking generations of wear. read more
Individuals in whose chart, Jupiter is posited in the 11th house, 3rd house, 4th house can wear Yellow Sapphire gemstone in Jupiter periods subject to the conditions stated above. Can Gemini Ascendant/Mithuna Rashi wear Yellow Sapphire Gemstone. Jupiter loses much of its potency in this ascendant ruled by Mercury. read more