It is a jewel of the Saturn planet.
Saturn in Aries is the Lord of 10th and 11th house. Therefore, it would be beneficial for you to wear sapphire during the Saturn dasa.
Saturn in Taurus is the Lord of 9th and 10th houses, and the Lagna Lord Venus is an ally. So, wearing sapphire would be beneficial as it will boost happiness, prosperity, prestige, and respect.
Saturn in Gemini rashi is the Lord of 8th and 9th trikon, and the Lagna Lord Mercury is an ally, so wear sapphire during the Saturn dasa for the best results.
Saturn in Capricorn is the Lord of both afflictive. Hence, sapphire will be harmful for you.
Saturn in Leo is the Lord of 6th and 7th houses. Besides Lagna lord, Sun is inimical too. Hence, wearing sapphire will be harmful for you.
Saturn in Virgo is the Lord of 5th and 6th houses and Lagna lord Mercury is an ally. It would be beneficial for you to wear sapphire during the Saturn dasa.
Saturn in Libra rashi is the Lord of 4th and 5th house and the Lagna lord Venus is an ally. Wear sapphire for happiness in every field. It will be fruitful specifically in the dasa of Saturn.
Saturn in Scorpio rashi is lord of 3rd and 4th house and Lagna lord Mars is not friendly. So, wearing sapphire in the Saturn dasa will be good but only after consultation.
Saturn in Sagittarius is the Lord of 2nd and 3rd house, and Lagna lord is an enemy of Jupiter. Sapphire will not work in your interest.
Saturn in Capricorn rashi is the Lagna lord and is the lord of 2nd house. You should wear sapphire for happiness and prosperity.
Saturn in Aquarius is the Lagna lord and is the Lord of 2nd & house. It would be fruitful & advantageous for you to wear sapphire.
Saturn in Pisces is the Lord of 11th and 12th house and is afflictive to Jupiter. It you wear sapphire after seeking special advice, you will grow economically.