Gem-Knight

The Gem-Knight monsters are an Archetype released in Duel Terminal - Vairon Descends!!. Their team symbol is a jewel droplet adorned with gold trim and two small arched points with usually the jewel color being respective of the monster or object it is attached to. All known Gem-Knights are EARTH, and are all Pyro, Thunder, Aqua and Rock-Type, which represents their elemental powers. They are all named after different minerals. Aesthetically, they appear to be a "fusion" of Jesse Anderson's Crystal Beast and Jaden Yuki's Elemental Hero cards, possibly a homage to their friendship in the anime. This is shown on some cards such as "Gem-Knight Fusion" (a fusion of "Crystal Release" and "Miracle Fusion"). It is also interesting to note that while the three Normal Monsters, "Gem-Knight Emerald", and "Gem-Knight Alexandrite" are shown without weapons, the six Fusion Monsters are shown using weapons befitting their stats and effects (Gem-Knight Aquamarine uses a bladed shield, Gem-Knight Ruby uses a polearm, Gem-Knight Topaz uses twin bladed tonfa, Gem-Knight Amethys wields a shield and a form of thin blade or wand,Gem-Knight Citrine uses a sword and Gem-Knight Prism Aura uses a lance and a shield.).

These are the Gem-Knight Fusions and their Components.

"Gem-Knight Pearl" is the first and currently only, Gem-Knight Exceed Monster. While any 2 Level 4 Monsters are required to Exceed Summon Pearl, the following are the Gem and Gem-Knight Monsters that can work with Exceed Summoning Pearl:

These are the Gem-Knight Cards and the Gem/Creature that they are based off.

Theoretical Play style
The Gem-Knights use a kind of Beatdown strategy using the Normal Gem-Knights and their Fusion Counterparts that can quickly be summoned with the easy to get "Gem-Knight Fusion". The Normal Monsters can benefit from most of the Normal Monster support cards as well as their own related "Kalut-Type" monster - "Gem Merchant". They are relatively quick since "Gem-Knight Alexandrite" and "Gem-Armadillo" search-out the Gem-Knights you need from your Deck.

Because of the card "Gem-Knight Fusion", which can return itself to your hand at the relatively low cost of a Gem-Knight from your graveyard, the Deck can also use many discard effects. Use cards such as "Phoenix Wing Wind Blast" to remove threats from the field.

Since half of the Gem-Knight Fusion Monsters are Level 6, "Fusion Weapon" might help a lot by increasing the ATK of those monsters. Also, all of the Gem-Knights are EARTH Attribute Monsters, so you can use "Gaia Power".

With the release of the Gemini Monster Gem-Knights Amber and Iolite, Gemini support such as "Gemini Spark", "Gemini Trap Hole" and "Supervise" would be ideal additions if the two were to be added.

Future Fusion is also a great card to use in this decktype as it will help pull the fusions out with more ease.

Actual Play Style
The Gem-Knights use a strategy akin to the Gladiator Beast and Toolbox playstyle, quickly switching in and out needed situational allies to gain effects and maximize damage. Because Gem-Knight Emerald can be used to easily obtain any Gem-Knight fusion and is so easily obtained himself, he is the enabeler for Gem-Knight toolbox decks.

Gem-Knight Alexandrite and Gem-Knight Emerald are key cards, bringing into play Gem-Knight Crystal quickly and sending him to the graveyard to tag out with the fusion obtained through Gem-Knight Emerald. In this way, Emerald is the main toolbox enabeler, with Gem Enhancement tagging out to trigger Gem-Knight Amethys and Release from Stone to bring back Gem-Knight Emerald for continued combinations or other fusions.

Gem Enhancement also provides for attacking chains, where Gem-Knights can attack and switch out for other Gem-Knights in the graveyard. These, with Pyroxide Fusion, can devastate and easily provide OTKs with the aid of Gem-Knight Amethys for spell/trap clearings.