Yes wool is strong, this is because sheep drinks water and eat grass. That is the only reason why wool fabric is strong.
Good quality wool can be any colour.
From Wikipedia, below: "The quality of wool is determined by its fiber diameter, crimp, yield, color, and staple strength. Fiber diameter is the single most important wool characteristic determining quality and price."
good quality
For the highest quality wool mattress pad, try seeking local stores in areas with renown for their wool products that deliver to your home. Many European and Icelandic or Australian companies produce top quality wool and handcrafted wool products and offer international shipping. Many domestic companies offer quality wool mattress pads as well and services like Google's product search and GoCompare.com make comparing prices easy.
yes
The different types of wool are used for different purposes. Some wool that is fine may be used for clothing. Some wool that is more coarse may be used as a filler. The quality is determined by the grading system of micron. The grade given for the wool determines the profit that can be made.
Yak wool is naturally resistant to odor. Baby yak wool is becoming the new cashmere, given its ultra-fine , soft feel. Unlike cashmere, it resists pilling, and is 10-15% warmer than merino wool--often touted as the highest-quality benchmark for wool.
Mittens are typically made of wool. A new movement is at hand that recycles old wool sweaters because they generally have a better quality wool. Some lesser quality mittens are made with synthetic materials.
Wool is the hair coat of sheep and some other animals such as the alpaca. Different types of sheep produce different types of wool. Some wool is a high quality and can easily be spun into yarns, while some wools are best made into felt. Wool fabric is made from wool yarns that have been twisted into yarns. This takes a fairly high quality of wool to make a good fabric for suits, ect.
As the quality of wool (micron etc) has a genetic component so feasibly if you breed fine microns together you will get finer micron
Merinos
Yes, if you get a good quality rug.