Spinel in an Engagement Ring

Spinel can sit in an engagement ring as jewelry, and that fact does not make it a marriage gem, because the marriage house is the 7th and Venus's navaratna is diamond. Red spinel has been used as an uparatna when ruby, the Sun's stone, is not worn. A solar substitute on a betrothal band ties the ring to Surya, authority and the self, not to the spouse. That link would be false for a diamond, which follows Shukra. Many engagement rings are diamonds for reasons of custom and hardness, and the custom happens to match Venus. A spinel chosen because it resembles ruby, or because it is more affordable, is a jeweller's choice. It does not activate the 7th lord. It also does not spoil the 7th lord. Fashion stones without a graha assignment are astrologically quiet.

If a couple wants the ring to carry a graha, the graha is the 7th lord of the chart being supported, or Venus in a man's chart and Jupiter in a woman's as karakas, and only when that graha should be strengthened. For Mesha lagna the 7th lord is Venus, so diamond is the coherent stone and spinel is a detour. For Simha lagna the 7th lord is Saturn, and the coherent and dangerous stone is blue sapphire, not a pink spinel. Putting Saturn's remedy into an engagement ring is a serious act, not a romantic one, and it should not be done because the metal looked good. D9 still has to support the marriage. A ring does not repair a 7th lord in the 8th. The muhurta of the engagement, if one is kept, is a panchang question for that year, not a property of the stone.

Decide which object it is. A spinel engagement ring can be beautiful and astrologically neutral. A remedy ring should be the right gem, in the right metal, first worn on the graha's weekday, for a lagna that wants that graha. Mixing the two leads people to 'charge' a wedding band with a Sun substitute and then wonder why marriage did not change. The Sun's mahadasha is only 6 years and may not be the marriage period at all. The 7th lord's period is the one that matters, and it may be Mercury's emerald or Mars's coral. None of those is spinel unless you are explicitly substituting for ruby and the Sun is the 7th lord, which happens only for certain lagnas, such as Aquarius, where the Sun rules the 7th. Even then ruby is the primary stone and spinel is the stand-in. Name the lord before you name the jewel.