Unicorn hair generally produces the most consistent magic, and is least subject to fluctuations and blockages. Wands with unicorn cores are generally the most difficult to turn to the Dark Arts. They are the most faithful of all wands, and usually remain strongly attached to their first owner, irrespective of whether he or she was an accomplished witch or wizard.
Minor disadvantages of unicorn hair are that they do not make the most powerful wands (although the wand wood may compensate) and that they are prone to melancholy if seriously mishandled, meaning that the hair may 'die' and need replacing.
The true match for a beech wand will be, if young, wise beyond his or her years, and if full-grown, rich in understanding and experience. Beech wands perform very weakly for the narrow-minded and intolerant. Such wizards and witches, having obtained a beech wand without having been suitably matched (yet coveting this most desirable, richly hued and highly prized wand wood), have often presented themselves at the homes of learned wandmakers, demanding to know the reason for their handsome wand’s lack of power. When properly matched, the beech wand is capable of a subtlety and artistry rarely seen in any other wood, hence its lustrous reputation.
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. It has one pronounced quirk, which is that it is abnormally attuned to inner conflict, and loses power dramatically if its possessor practises any form of self-deception. If the witch or wizard is unable or unwilling to be honest with themselves or others, the wand often fails to perform adequately and must be matched with a new owner if it is to regain its former prowess. Paired with a sincere, self-aware owner, however, it becomes one of the most loyal and impressive wands of all, with a particular flair in all kinds of charmwork.
Wand-quality aspen wood is white and fine-grained, and highly prized by all wand-makers for its stylish resemblance to ivory and its usually outstanding charmwork. The proper owner of the aspen wand is often an accomplished duellist, or destined to be so, for the aspen wand is one of those particularly suited to martial magic. An infamous and secretive eighteenth-century duelling club, which called itself The Silver Spears, was reputed to admit only those who owned aspen wands. In my experience, aspen wand owners are generally strong-minded and determined, more likely than most to be attracted by quests and new orders; this is a wand for revolutionaries.
My august grandfather, Gerbold Octavius Ollivander, always called wands of this wood ‘the survivor’s wand,’ because he had sold it to three wizards who subsequently passed through mortal peril unscathed. There is no doubt that this wood, coming as it does from the most resilient of trees, produces wands that demand staying power and strength of purpose in their true owners, and that they are poor tools in the hands of the changeable and indecisive. Fir wands are particularly suited to Transfiguration, and favour owners of focused, strong-minded and, occasionally, intimidating demeanour.
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. Many wandmakers insist that pine wands are able to detect, and perform best for, owners who are destined for long lives, and I can confirm this in as much as I have never personally known the master of a pine wand to die young. The pine wand is one of those that is most sensitive to non-verbal magic.
Holly is one of the rarer kinds of wand woods; traditionally considered protective, it works most happily for those who may need help overcoming a tendency to anger and impetuosity. At the same time, holly wands often choose owners who are engaged in some dangerous and often spiritual quest. Holly is one of those woods that varies most dramatically in performance depending on the wand core, and it is a notoriously difficult wood to team with phoenix feather, as the wood's volatility conflicts strangely with the phoenix's detachment. In the unusual event of such a pairing finding its ideal match, however, nothing and nobody should stand in their way.