Pillar article
Venus's Stone Is Diamond; a Woman's Husband Karaka Is Jupiter
There is no universal love stone. The 7th lord may be Saturn, and strengthening Saturn is a different act from wearing a diamond for Venus.
Two karakas, two stones
Venus is the karaka of marriage in a man's chart, and its stone is the diamond. A woman's husband karaka is Jupiter, whose stone is yellow sapphire. Love marriage also needs the 5th lord of romance and the 7th lord of the bond. If those lords are Mercury, the stone in the same lists is emerald, not a love diamond. Wearing diamond because the question contains the word love strengthens Venus even when Venus rules the 6th and the 11th and is not the 7th lord. For a Capricorn lagna Venus rules the 5th and 10th and is yogakaraka, so diamond talks to romance and career together. For a Scorpio lagna Venus rules the 7th and the 12th, so diamond talks to marriage and expense. Same stone, different bill.
Do not strengthen a dusthana 7th lord blindly
If the 7th lord sits in the 8th and you wear its stone, you are strengthening a lord who is in a rupture house. That can intensify the marriage topic, including the hard part. The auspicious move is sometimes not a stone. It is waiting for a better antardasha and reading D9. Blue sapphire for Saturn is the classic dangerous default when Saturn delays marriage. If Saturn is yogakaraka, the delay is attached to a good lord and the stone is a serious discussion. If Saturn rules the 8th, the stone is a poor idea sold as a love remedy. Name the 7th lord before you name the gem. If you cannot, you are shopping, not reading.
Love marriage does not change the gem
A 5th-and-7th link is the yoga. The gem does not create the link. Rahu with the 7th lord, a common love-marriage signature, has hessonite as its stone, which amplifies Rahu. Amplifying an unconventional marriage can make it more nodal, not more peaceful. Skip hessonite as a love charm. Venus or Jupiter, chosen by the karaka that matches the chart and only when the planet is worth strengthening, is the conservative pair. Even then a gem is not a muhurta and not a dasha. Venus mahadasha is 20 years. A diamond does not start it. Success in the marriage, if the chart can speak of it, is the 7th lord's condition in D9. The stone is optional. The lord is not.
Frequently asked questions
Is diamond the love marriage stone for everyone?
Diamond is Venus's stone. It fits when Venus is the graha you intend to strengthen.
What stone is Jupiter?
Yellow sapphire in the standard list. Jupiter is the husband karaka in a woman's chart.
Can a gem create a 5th-7th link?
No. The link is a birth placement. A gem does not move lords into each other's signs, and it does not time the wedding.
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D1, D9, D10, dashas, yogas, and transits, the same calculations referenced in this article.