Young boy protagonist with a sword containing a red stone on its hilt?


It was in a modern day world with guns and wars, there was some kind of armed
conflict going on.

The story was about seven powerful crystals or gems or rounded stones, each
carried by a different person wielding it in a way that suits his fighting:

  * One of them had it embedded in his shield, it was green I believe
  * One of the characters also carried his stone around and played with cards
  * The main protagonist had it in the hilt of his sword I think

In one of the scenes the boy was shown to have been born with the stone in his
hand.

By the end of the series they were trying to unite the power of the stones to
defeat some kind of enemy.




I think it could be **[Shin
Hakkenden](https://www.animenewsnetwork.com/encyclopedia/anime.php?id=1988)**
(1999, 26 episodes)

> The year is 2588 in the system of Godworld and its eight satellites.
> Humanity came here in the distant past, after a long journey across the
> stars from Earth. Now the system is ruled by a loose coalition of powerful
> families: House Owari, House Meed, and House Iigy. The story begins when
> Kai, the heir to House Owari, attacks an icy planet. Living in a humble
> village on the surface is Kou, a young boy who is perpetually arguing with
> his father. When Kai's navy arrives, Kou takes his father's mighty Murasame
> sword to fight back, and his adventures begin. A sci-fi remake of Hakkenden.
> (Plot from [Animevice](http://www.animevice.com/shin-hakkenden/11-4852/)).

This is a picture of the main character **Kou** who has a red gem in his sword
(You can also see a dog with an eyepatch: it hide a yellow gem in one of his
teeth).

![A pic](https://i.stack.imgur.com/SXHgMm.jpg)

This is **Jinrai** who has a green gem in his shield.

[Another pic
http://gallery.animeinfo.ru/img/Jinrai-125835-57413-1.jpg](http://gallery.animeinfo.ru/img/Jinrai-125835-57413-1.jpg)

This is **Tomoka** who has a blue gem in a dice: he is a gambler and use cards
also for fighting.

![Tomoka](https://i.stack.imgur.com/D9Ycfm.png)

