Wandlore

Some wands are more suitable for dark arts, and some mix very poorly with it. All wands properties depend on the wood, core, length and flexability. (And of course, the wizard using the wand).

Woods I consider great for aspiring passionate wizards, and wood that is great (or specifically wood that is poor) for performing Dark Arts. 

Acacia - Acacia is a tricky wood that usually performs magic only for its own owner. It withholds its best and most effective magic from those not of talent, but those who are gifted get to experience a magnicifent wand.

Apple (Malus Domestica) - Mixes extremly poorly with Dark Arts.

Ash (Fraxinus) - Ash is slightly associated with the Dark Arts, as the ash tree is said to ‘strangle’ the plants around it. It does excel at Dark magic, but is also good for Transfiguration. They also tend to bond to good Diviners.

Beech (Fagus) - The true match for a beech wand will be, if young, wise beyond their years, and if full-grown, rich in understanding and experience. Beech wands perform very weakly for the narrow-minded and intolerant.

Blackthorn (Prunus Spinosa) - Blackthorn, which is a very unusual wand wood, has the reputation, in my view well-merited, of being best suited to a warrior.

Black Walnut (Juglas Nigra) - Less common than the standard walnut wand, that of black walnut seeks a master of good instincts and powerful insight. Black walnut is a very handsome wood, but not the easiest to master.

Cypress (Cupressus) -  Cypresses have long been associated with the Greek god of the underworld, Hades. This wand has subtle power, and is good at Transfiguration and Dark Arts.

Elder (Sambucus) - The rarest wand wood of all, and reputed to be deeply unlucky, the elder wand is trickier to master than any other. It contains powerful magic, but scorns to remain with any owner who is not the superior of their company; it takes a remarkable wizard to keep the elder wand for any length of time.

Elm (Ulmus) - There was a belief that only pure-bloods can use an elm wand, however that is simply not true. But it's still a very famous wand for pure-bloods or Dark Art Wizards.

Hornbeam (Carpinus) - Hornbeam selects for its life mate the talented witch or wizard with a single, pure passion, which some might call obsession (though I prefer the term 'vision'), which will almost always be realised.

Pine (Pinus) - The straight-grained pine wand always chooses an independent, individual master who may be perceived as a loner, intriguing and perhaps mysterious. Pine wands enjoy being used creatively, and unlike some others, will adapt unprotestingly to new methods and spells.

Poplar (Populus) - Although poplar is a light wood, it is sometimes found in the wands of Dark Wizards, who find its properties of being extremely similar to human bone desirable.

Vine (Vitis) - Vine wands are among the less common types, and I have been intrigued to notice that their owners are nearly always those witches or wizards who seek a greater purpose, who have a vision beyond the ordinary and who frequently astound those who think they know them best.

Yew (Taxus) - Yew wands are among the rarer kinds, and their ideal matches are likewise unusual, and occasionally notorious. The wand of yew is reputed to endow its possessor with the power of life and death.

Cores

Dragon heartstring - Powerful and easy to learn spells, though could easily be committed to another owner. Popular for Dark Magic purposes.

Phoenix feather - Greates range of magic, hard to be chosen. Popular for Dark Magic purposes. 

Rougarou hair - Rumoured to have had an affinity for dark magic, although suitable for use by non-dark wizards and witches as well.

Unicorn hair - Most consistent magic, bonded strongly to first user. Not very efficient in Dark Magic.

Basilisk horn - Not much is known about this core. Presumably had an affinity for the Dark Arts. It was created by Salazar Slytherin himself.

What this says about my own wand:

Elm wood - As mentioned earlier, it was long believe that only pure-bloods could use these wands, but that's obviously false. Though it's still popular amongst pure-blood and Dark Magic users. Elm wands prefer owners presence, magical dexterity and a certain native dignity. Of all woods, elm is said to produce the fewest accidents, the least foolish errors and the most elegant charms and spells. These are sophisticated wands, capable of highly advanced magic in the right hands. WHich, again, makes it highly desirable for wizards that practise Dark Magic and pure-bloods.

Phoenix feather core - This is the rarest core type. Phoenix feathers are capable of the greatest range of magic, though they may take longer than other cores to reveal this. They show the most initiative, sometimes acting of their own accord, a quality that many witches and wizards dislike. These wands are always the pickiest when it comes to potential owners, for the creature which they are taken from is one of the most independent and detached in the world. These wands are the hardest to tame and personalise, and their allegiance is usually hard won.

Flexability

Wand flexability or rigidity denoted the degree of adaptibility and willingness to change possessed by the wand-and-owner pair.