sharks, skates, and rays have skeletons made of cartilidge
You get what you pay for. Expensive skates are usually worth the money, however cheaper skates are usually pretty good too. Note: They're made in China, so its unlikely the build quality will approach handmade custom skates from the United States, Canada, Japan, Netherlands and such.
the first hockey skates were made by trevor radin
aggresive skates are made for more aggresie skating
Ice skates can get extremely expensive occasionally. You can buy basic skates for very cheap or get skates custom made and fitted with a separate blade to suit you. I would say that your skates are probably quite basic, not that there is anything wrong with that for a beginner. I would think that unless you are landing big jumps or skating very regularly, your skates will be just fine to buy! make sure that you sharpen them too!
The guinea coin was not made after 1816.
Wood and leather. See the history of roller skates linked below.
400b.c
Switzerland
50-300 usd
$75-$150
People wear inline skates, ice skates and Izod shirts. Iron Heart is a brand of clothes made in Japan.