The answer is simple. One lightsaber strike cannot cut through the Mandalorian Beskar armor or a Beskar weapon. But if a lightsaber stays in touch with it for a longer period, it will melt it.
Beskar, also known as Mandalorian iron or Mandalorian steel, was an alloy that was used in Mandalorian armor and was notable for its high tolerance to extreme forms of damage. In its purest forms, the metal was durable enough to withstand a direct blaster shot and could repel lightsaber strikes.
The only possible way for a lightsaber to harm Superman would be if the crystal powering the lightsaber were made of Kryptonite. However, that would still credit the Kryptonite crystal, not the actual lightsaber. Unfortunately for any Force sensitive that encounters the Man of Steel, Superman wins.
Throughout the Star Wars franchise, beskar is extremely blaster-resistant, though there are some exceptions to this. The Mandalorian and Death Watch warriors in Star Wars: The Clone Wars and Star Wars Rebels are shown being killed by single blaster bolts, which penetrate their beskar armor.
Because the Darksaber's sentience intertwined its fate with the rulers of Mandalore, Mando's rejection of that role meant that their wills could never align. That's why he has so much trouble wielding the weapon: it doesn't want to be wielded by a selfish bounty hunter who doesn't care about Mandalore.
The black lightsaber, or Darksaber to give it its proper name, is one of the rarest lightsabers in Star Wars canon. Despite its rarity in canon, anyone who has seen the second season of The Mandalorian is likely to be familiar with the Darksaber.
Beskar is supposedly resistant or proof to lightsabers, but is it strong enough to prevent itself from being crushed by someone using the force? Beskar is an extremely tough metal. It's unable to be affected by blaster bolts and even lightsaber strikes.
Properties. Mandalorian iron, also known by its Mando'a name of beskar, was an extremely durable iron ore whose only known source was the Outer Rim world of Mandalore and its moon, Concordia.
Darth Vader's armor isn't made of beskar, but of durasteel, allowing mobility and absorbing energy from lightsaber blows. Obsidian in the armor supercharged Vader's dark side power, turning anger into a power source.
In The Mandalorian season 2, episode 5, "The Jedi", Ahsoka Tano surprise attacks Din Djarin, who uses his beskar armor (including his bracers) to block her lightsabers.
There is not a “rainbow” lightsaber, but there is a “white” lightsaber which could easily be all the colors of the spectrum. I ddi some research on this, and the current canon has most of the lightsabers either being green, blue, or like the Sith, red.
The study suggests that, against all expectations, red lightsabers may actually be the weakest of the lot. This revelation invited us to venture beyond the realms of science fiction and embark on a journey of scientific exploration. Enter Luke Willcock, the mastermind behind this revelatory study.
After Sabine observed that the Darksaber is deceptively heavy, Kanan explained that energy follows through the blade, with the wielder directing its current of power. The wielder's thoughts and actions flow into the Darksaber to fuel this energy, affecting the weight.
All of that goes to show that Mando not being able to lift the Darksaber has nothing to do with how he acquired the blade or his failing the Creed. Accordingly, the best explanation is still that the Darksaber doesn't personally approve of Mando.
The Armorer trained Djarin with the Darksaber, before Paz Vizsla challenged him to a duel, as Paz was the descendant of its original creator. Djarin and Vizsla dueled, though Djarin ultimately won. However, he was banished from the ways of the Mandalorian after the Armorer discovered that he had removed his helmet.
Boba Fett's armor was a suit of customized Mandalorian armor worn by Boba Fett, a human clone who became a bounty hunter. The armor was made from beskar. It consisted of a helmet, a cuirass, vambraces with retractable wrist blades, and a Z-6 jetpack.
It's possible that Gideon used the pure beskar from a fallen Mandalorian in order to craft his own helmet from scratch, or he just used it as is. It's also a possibility that Esposito's villain is using the same general helmet of a dead Mandalorian but made some alterations to it along the way.
