Aside from the diamond, the ruby, sapphire, emerald, pearl (strictly speaking not a gemstone) and opal have also been considered to be precious. At least at the beginning of the 20th century these stones were considered precious more often than not because of their beauty.

Jade has long been considered a good luck stone. It also symbolizes beauty, good fortune, grace and purity. In China, jade is called "yu," meaning "royal gem."It is important to know the different shades and grades to buy the best stone available. Learn the difference between the two types of jade, jadeite and nephrite, to purchase a stone worthy of royalty.