harry potter - Did Tom Riddle and Voldemort have the same wand?

This question caused me to think of another question.

The books/movies establish that Voldemort (as well as Harry) has a wand with the incredibly rare Phoenix feather as the core. Voldemort's wand is also depicted looking like a creepy bone type design (made of yew) to match his "evilness" which was made by Ollivander (at least in the movies)

Is this the same wand that was given to Riddle before his first year at Hogwarts? If not, what kind was it? It would seem odd that he would get such a wand designed like that as a child.

Answer

None of the movie wands were special-looking in the first two films. Prisoner of Azkaban introduced the personalized wands, and the trend remained throughout the subsequent films. Before that, all wands pretty much looked identical - a simple black or dark brown wooden stick. So that's why they look different - there was a redesign of nearly all the wands (out-of-universe).

As pointed out in CreationEdge's answer, the wand used by young Tom Riddle is a simple, dark-colored wand. Just as Harry's wand is the "same wand" in all eight¹ films even though it looked different in the first two films, I would say that it follows that Voldemort's bone-looking yew wand is the same wand seen being used by Tom Riddle in Chamber of Secrets. The reason it looks different is simply that it too was redesigned, just like Harry's was.

We know that Voldemort's bone-looking wand is the same one he got from Ollivander. See Au101's answer for quotes from the book.

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A possible in-universe explanation could be that, at some point after Chamber of Secrets, Voldemort either had a newer, more evil looking outer shell added to his wand (or had the core put into a new wooden shell). Lucius Malfoy's silver snake head was an ornamental add on, so maybe Voldemort did something similar. :)

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¹ _{Yes, I know Harry's wand broke in Deathly Hallows part 1 but it was mended (off screen) in Deathly Hallows part 2, so one could still say it's the wand he used in all eight movies. Also it's simpler that way. :)}