Ring of Solaria/Series

Pre-Series
It is a part of the lineal right of the Princess of the Sun and Moon of Solaria and has been in the royal bloodline of Solaria since forever. It was forged so long ago that no one remembers when. It was carved out of a stone, immersed in the Spring of Light which still flows in the universe. The ring was also considered as one of the most precious gifts offered by the Dragon Flame.

Season 1
In "An Unexpected Event," Stella uses her scepter against Knut and his ghouls in Gardenia Park, which Knut then steals as his ghouls restrain her, but she is able to recover it due to Bloom's unintentional attack. After leaving, Knut reports to his mistresses that his failure to procure the scepter, which was in his hands, was due to an Earth girl with extraordinary powers.

In "Welcome to Magix!," Icy tells Knut that the scepter must belong to the Trix. Later, the Trix and Knut pursue Stella and the Winx, but Stella is able to transport everyone out of harm's way just in time.

In "Alfea College for Fairies," Stella puts her ring in a case, which is then put in jewelry chest for safekeeping. Later, at Alfea, before the Trix bewitch the Specialists' gifts for the fairies of Alfea, Darcy uses a spell to see the location of Stella's ring in order to steal it, which Bloom alerts Stella of. They later use a spell to summon the jewelry chest, but Bloom is not far behind and manages to snag the ring case. However, after putting Bloom out of commission, Icy takes possession of the ring. After alerting the Winx that the Trix stole the ring, Flora assures Bloom that the ring is safe. Later, at Cloud Tower, it is revealed that the ring inside the case has been swapped for an enchanted egg, which yields the birth of Pepe.

In "Date with Disaster,” Stella gives Bloom her ring for safekeeping. Later, a seemingly different Stella tears the dorm apart in search of the ring, and goes as far as confronting Bloom to hand it over. Later, after retracing Stella's steps, it is revealed Darcy was masquerading as Stella to procure the ring and the Trix have taken the real Stella hostage. The Trix, who are in an abandoned warehouse with the Winx, give them an ultimatum: the ring for Stella's life. The Winx are prepared to fight, but Bloom decides they cannot risk Stella's life and hands over the ring, freeing Stella.

In "Mission at Cloudtower," Bloom finds a book explaining the origins of the ring, and the Winx learn that it is an important and valuable object passed down through generations of Solarian royalty, partly created by a spring of light born of the Sacred Fire, but this does not explain why the Trix are so eager to have it. Later, the Winx decide to infiltrate Cloud Tower in order to reacquire the ring. Meanwhile, the Trix attempt to tap into the power of the ring but yield no results. They angrily conclude that the ring does not contain the power of the dragon as they hoped. Later, the Winx enter the Trix's dorm and Stella finds the ring.

From then on, the ring would continuously be used in battle, no longer a target for the Trix. Some of the ring's significant uses include teleporting into Bloom's home to try and convince her to return to Alfea only to learn that her powers were stolen, then melting the surrounding snow and icy pillars of the frozen Domino Palace and illuminating the dark hallways as the Winx explore the its abandoned halls before encountering Daphne, and when Stella, Flora, Musa and Tecna converge their powers onto the ring to overpower Stormy (turning the tornado she against her) and Darcy in the final battle against the Trix.

Season 2
Mostly used in the first episodes to illuminate dark places, defeat two monsters, help plants grow as well as teleporting. Which was done twice.

In "Magic Bonding", it is explained to Sky that Stella must know the location they want to teleport to very well, otherwise they might end up anywhere.

Season 3
Stella used the Ring of Solaria in the eighth episode of Season 3. She used it to defend her father, Radius. Stella sacrifices her life for him and earns her Enchantix. Stella does not use her ring as a weapon much anymore after receiving her Enchantix, but she still did use it to teleport the team to places like Andros and Linphea. It is unknown where she keeps her ring during present time, but it is possible it is kept at Solaria or in her jewelry box.

Season 7
In "Mission In the Jungle", the ring was briefly seen when Shiny eats it.

The Fate of Bloom
Stella uses her scepter against Knut and his ghouls in Gardenia Park, which Knut then steals as she drops it, but she is able to recover it due to Bloom's unintentional attack. After leaving, Knut reports to his mistresses that his failure to procure the scepter, which was in his hands, was due to an Earth girl with extraordinary powers. Later, the Trix and Knut pursue Stella and the Winx, but Stella is able to transport everyone out of harm's way just in time.

The Battle for Magix
Learning that the power they were seeking for is within Bloom, the ring no longer served any significance to the Trix as they changed their target. Stella would use the ring to teleport into Bloom's home to hopefully try to talk to her only to learn that her power was stolen. The ring would then be used in the final battle against the Trix. When Stormy trapped Stella, Flora, Musa and Tecna in her tornado to incapacitate them but the girls converge their powers onto the ring to turn it against her then had it go after Darcy, finally defeating them.

The Shadow Phoenix
Stella uses it mostly when on the pixie rescues mission against the Trix one of which was used to project a shield to defend herself against Stormy's tornado only for it to over the shield.