I found a website,

http://theforce.jaymach.com/index.php

That has alot of info on junk I didn't know about.. xD
I'll paste some info here, from one of the pages fo this site. It took me a crapload of time to get it all right, being as I had to get the HTML to get the text.. xD

Adegan Crystals
These minerals emit powerful bursts of light when induced by resonant frequencies. This trait makes them the most common crystals used to construct lightsabers. The different types of Adegan crystals, in order of rarity, are Kathracite, Relacite, Danite, Mephite, and Pontite. The rarer the crystal is, the better suited as a Lightsaber crystal it is also. Though Adegan crystals are usually either blue or green, there have been several recorded cases of other colors, and it is known by the Jedi that they do, in fact, come in all colors imaginable.
Barab Ore Ingot
The ore from Barab I actually lies on the planets surface, meaning it is exposed to high doses of radiation and torrenchal downpours daily. This ore can be found in concentrated ingots that actually store and magnify the radiation.
When placed in a Lightsaber, the ingots produce a blade that burns almost to the point of losing its cohesion.
Bondar Crystal
This crystal was mined on a far-orbit asteroid circling the Alderaan system. It produces a volatile Lightsaber beam that pulses on impact, potentially stunning an opponent.
Cortosis
Cortosis is a type of metal found scattered throughout the galaxy even though it is quite rare. It is similar in composition to other ore but it does have one stricking quality that keeps it apart from all other metals. Cortosis disrupts the blade of a lightsaber. The composition of the metal is such it "short curcuits" the energy blade produced by a lightsaber. There are a number of uses for Cortosis. Emperor Palaptine had parts of his throne room created using Cortosis and the battle armor of the Imperial Royal Guard contained it as well. The Jensaarai sect also used strands of this ore to layer their unique armor. Using the Force, they wove the cortosis into the shapes of vicious, predatory animals, making their armor forbidding as well as better able to defend themselves. The Chiss also knew of the strengths of cortosis, and used it in the walls that formed the Hand of Thrawn fortress on Nirauan. Despite its resistance to the blade of a lightsaber, cortosis was unstable in the presence of explosives, and would shatter if hit with a grenade. Though Cortosis Ore in its basic, natural form will force a Lightsaber to turn itself off, Cortosis alloys do not do this, they are merely resistant to Lightsabers, which can be seen to be either an advantage or a disadvantage

Corusca Jewels
Formed from the intense heat and gravity inside Yavin's core, these extremely hard stones have never been found or duplicated in other gas giants. Individual stones are formed from carbon and metallic hydrogen, which are compressed by millions of atmospheres of pressure near the planet's core. The intense pressure actually removes electrons from the hydrogen and carbon, fusing them together and securing the metallic hydrogen's silvery-gray brilliance. The harsh environment of Yavin often sweeps gems off the core's surface, as does the foraging of grazers in Yavin's lowest atmosphere. The turbulent storms pick them up and actually polish them, and some of these jewels eventually land on the planet's fourth moon. Gantoris used them to construct his lightsaber while under the influence of Exar Kun. Later, Lando Calrissian set up the GemDiver Station operation, and emplyed heavily-armored mining ships to plumb the atmosphere of Yavin for the gems.
Crystal-pearl
This lustrous, crystalline stone was considered a valuable gemstone by many cultures. In rare cases of incredibly dense and well-structured specimens, crystal-pearls could be used as the focusing crystals in a lightsaber. Tionne was one of the few Jedi Knights who used such a weapon.
Damind Crystal
Found on the desert world of Daminia, this crystal can be used in Lightsaber construction to produce a clearly defined beam of subtly wider width and length.
Dragite Crystal
This valuable crystal is mined in the D'olop mountains on the planet M'haeli. They have properties similar to Adegan crystals. The Lightsaber beam they create resonates loudly when it strikes.
Empeth Crystals
These strange crystals grow in the Crystal Valley on Lazerian IV. The crystals grow once every ten years, and only a pair grow each time. These cubic crystals seem to glow with an inner light, and once harvested from the valley they are nearly indestructible. Empeth crystals "live" for about five years after being picked, after which time they become dull, lackluster rocks. The empeth crystals are protected and hoarded by the King of Devit, on Lazerian IV. While valued for their beauty, empeth crystals also have an affinity for the Force. A Force-sensitive individual can detect the Force in another individual while holding a crystal.
Eralam Crystal
Once mined on the third moon of Erai, ancient Sith bombardment shattered much that remained. If they can be found, these crystals produce a clear, superior Lightsaber beam
Firkrann Crystal
This heavy crystal is collected by the natives of Rafa V. If used in lightsaber construction it produces an electrically charged beam that is devastating to droids
Hijarna Stone
This was the name given to the unique, indestructible stone used to build the fortress found on the planet Hijarna. It was also discovered in the construction of the Hand of Thrawn compound on Nirauan. The stone cannot be destroyed by blaster fire or turbolaser blasts. In fact, it seems to absorb the energy from these weapons like a sponge. (I'm assuming this means it can absorb Lightsaber energy also)
Ilum Crystals
Much like Adegan crystals, Ilum Crystals were favored by the Jedi Knights of the Old Republic for use in the creation of lightsabers. Found growing on the remote world of Ilum, each crystal had to be located and harvested by a Jedi padawan who faced the challenges of weather and nature to obtain the crystal.
Jenruax Crystal
The refined form of Opila, this crystal has been cleansed of all impurities. When used in Lightsaber construction it produces a blade of unerring quickness. Jenruax was believed to have given the wielder enhanced dexterity in combat.
Kaiburr Crystal Shard
Perhaps the most powerful crystal that can be used in a Lightsaber, the Kaiburr gem bestows insight and fortitude upon its owner, as well as having partial healing properties from the Kaiburr Crystal itself.
Kasha Crystal
Legend has it that the ancient founder of Cerea?s planetary leadership, Bi-Dar Tyunda, created the art form of etching multihued kasha crystals, found only on the Cerean homeworld. Scribing specific patterns into the crystal?s facets allows the artist to harness the crystal?s natural harmonic energy, which helps calm emotions and clear the thoughts. Cerean meditation crystals are found in most homes on Cerea.Kasha meditation crystals enable Cereans to focus their natural precognitive abilieis. One hour of quiet, uninterrupted meditation with a kasha meditation crystal allows a Cerean to be more calm and serene for the next 24 hours (regardless of the situation).Transforming an ordinary, unattuned kasha crystal into a meditative device requires an investment of 200 credits for raw materials, 72 hours of work, although without the skill necessary to create one, the raw materials are wasted, and the crystal does not function.
During the Galactic Civil War, kasha meditation crystals can be found only on Cerea.
When used as a Lightsaber crystal, it helps clear the wielder's mind of distractions even during tense combat.
Krayt Dragon Pearl
These are simply the gizzard stones used by the Krayt Dragon to help it digest its food. The stones are a lustrous, milky color. Obtaining the stones is a ritual of manhood for the Tusken Raiders. Taken from the gullet of a Krayt Dragon, this crystalline "pearl" appears to have refractory qualities that might allow it to function as a Lightsaber crystal once properly adapted.
Lorrdian Gemstone
During their subjugation, the Lorrdians were banned from speaking to each other and thus learned to use subtle gestures and ticks to communicate. The few Force-Adepts found after the Jedi freed the population of slaves has imprinted these gemstones with the Force to enhance the ability to read an opponent.
Luxum Crystal
Ambria was a world in the grip of the dark side. Through years of mental battle, strange Jedi Master Thon contained the evil to Lake Natth. Long meditation can form this powerful crystal from the tainted water.
Mandalorian Iron
A metal that is virtually indestructible, even to a lightsaber blade. Jedi Master Arca hid Freedon Nadd's Sith artifacts in a storehouse built from Mandalorian Iron in an effort to seal it forever, but Exar Kun used the Dark Side of The Force to penetrate it.
Nextor Crystal
This crystal is mined in the mountains of planet M'haeli, and when used in Lightsaber construction it produces a volatile blade that can cause surprising ammounts of damage.
Opila Crystal
Found in the asteroid fields of the Fyrth system, this crystal can be used in Lightsaber construction to produce an intense beam that seems extraordinarily quick to the cut.
Phond Crystal
The strange byproduct of rare impurities bonding during the making of certain alloys and some random external condition, this crystal produces a fiercely burning Lightsaber beam.
Qixoni Crystal
Qixoni crystals were formed on a planet that was destroyed millenia ago when its star went supernova. They are exceedingly rare and are also quite powerful. A Lightsaber with this crystal in it will respond to none but those of the dark side.
Rubat Crystal
Used in Lightsaber construction, Rubat Crystal is mined on Phemis. It produces a clearly defined blade that a Jedi can easily track, making it easier to hit opponents.
Ruusan Crystal
Ruusan crystals come from the Mid Rim planet of the same name. While not directly affecting a Lightsabers effectiveness, they aid a Jedi in focusing the Force.
Sapith Crystal
This crystallized material was excreted once every 11 years by the ancient Volice worm of Lwhekk, now extinct. It produces a more intense Lightsaber beam, granting better control.
Sigil Crystal
Mined in the Sigil System, this crystal is a costly but valued addition to a Lightsaber. It produces a fiercely bright beam that sears on contact, inflicting great damage.
Stygium CrystalThis rare, crystalline mineral is found only on Aeten II. Sienar Advanced Projects discovered that the crystal could be used to create a full-effect cloaking system that defeated the sensors and security systems of larger craft. In its pure crystal form, it is suitable for a Lightsaber.
Thaissen Crystal
Found only on the planet Circarpous V, these unusual crystals glowed slightly when in the presence of the Force. The glow as very faint, but could be enhanced using a dedicated power supply. This configuration was used by Emperor Palpatine to create his Force Detectors, during his hunt for fugitive Jedi Knights.
Ultima-pearl
An unusual choice for a Lightsaber focusing crystal, this rare stone can be found on Calamari. Difficult to properly install in a Lightsaber, this valuable stone has powerful effects. Cilghal used one as the focusing gem in her lightsaber.
Ultrachrome
This incredibly-dense metal was used in the production of vibroshields and other forms of blades, since it could withstand high temperatures and maintain a razor-sharp edge despite hard usage. When connected to a power supply, ultrachrome became a form of superconductor, absorbing energy and shunting it aside. This very ability allowed it to withstand Lightsabers, though if the Lightsaber touched it for too long it would melt the entire shield due to an overload of energy. Kar Vastor used an ancient form of ultrachrome in the construction of his vibro-shields; the metal was believed to have been taken from the hull of the crashed colony ship which brought the Korunnai's Jedi ancestors to Haruun Kal.
Upari Crystal
Strangely, this crystal is usually encountered scattered in the orbit of primarily forest worlds. It is brittle but versatile, and a Jedi Master can get it to produce many effects.
Velmorite Crystal
This unusual crystal, found only on the planet Velmor, was used as a focusing crystal in the creating of an Velmorite Energy Sword. When used in a Lightsaber, these crystals produce a very fine beam that is easy to wield skillfully.