I bought a bracelet and said it was an opal. The great god will identify it.

Do you know what opal is? Haven't you seen the cat's eye at night? Is there a big opal in the world? Any gem with cat's eye effect can be called opal. The best cat's eye effect among gems is opal in emerald. Opal must be cut and polished into a waist shape, and a flat interface is needed to produce a cat's eye effect. If the person who sells you the bracelet tells you that it is full of green jade, you can get by. If this bracelet is really green, it is valuable. According to the current price of large jewelry stores, it will cost at least 500,000 RMB. Now I wonder if this bracelet is jade. At least the bracelet seller said it was made of opal, and he made the lowest mistake. People who know a little about gems and jadeite should know what the cat's eye effect is. Can you use a jewelry magnifying glass 20-40 times to see if there are any bubbles in it? If there are bubbles, they are made of synthetic materials. If there are no bubbles, this bracelet must be B. You can also take it to a testing center with A-level qualification for testing. Generally, a card costs only 30 yuan. Good luck! !