Platinum is divided into 900,950,990, but I recommend that 950,990 is too soft.
There are two ways to sell platinum necklaces, one is by the gram and the other is by the piece.
According to the average price (about 350/g), a 6-gram or 7-gram platinum necklace is around 3000, but the price of gold of different brands is different. For example, some small brands will be cheaper. There is no charge for 1g in the early 300 s, but the gold price of a big brand like Zhou Shengsheng can reach 498 yuan per gram! And also receive 220 wages! I bought his 950 ring in April, and actually spent more than 700 yuan per gram, but fortunately I like the style, so I don't care about the price.
In addition, some brands charge by the number of pieces. For example, a platinum necklace, the actual gram is only 7 grams, but because of the good technology, it has to be sold for more than 7000 yuan, with a maximum discount of 10%. The price is obviously more expensive than that calculated by gram. I once saw a platinum necklace and gave it up because it cost twice as much as grams.
Diamond pendants are hard to say. Depending on the size of diamonds, the added value of big brands is estimated to account for more than 30%. Diamond pendant inlaid with 18K gold. A diamond pendant of about 30 cents can be sold for more than 4,000 yuan with K gold, and the water content is relatively high. If it is inlaid with platinum, it is more than 20% more expensive than K gold.
Therefore, it is better to buy a pendant than a platinum necklace of 6 or 7 grams, but it is really fashionable to buy a diamond pendant. So it depends on your girlfriend's personality and preferences.
There are many brands to choose from in Shanghai. The National Day is coming, so many jewelry brands will engage in some promotional activities. You can go to some shopping malls in advance to find out. Maybe their activities have already started ahead of schedule. Generally speaking, there are fewer promotions for pure yellow platinum, and there will be more inlaid jewelry. You must choose a reliable brand.