Additional Shipping Fee Listing(s) - 【Pick A Gem】Petile Australian Dark Opal Round Cabochons

📢 **This listing shows pictures of opals only. Do NOT place any order here.** **【Custom Necklace】** (1) Choose your desired opal from 1~8 in the pictures provided. (2) Choose gold color: 18k yellow, white, or rose gold. (3) Decide chain length such as 16 inches, 18 inches, or two-length adjustable. (4) Let us know if you want a Diamond Halo design. (5) Message us when you are ready to order with the above-mentioned specs. We will send you a quotation then. 📢 **Price reference**: standard necklace with one prong-set opal is priced at NT$14,500-15,800. Additional NT$10,000-12,000 will be added with a diamond halo design. **【Gemstone & Metal】** **Main stone**: Australian Dark Opal, with play-of-color, round cabochons about 4–4.5 mm. **Metal**: 18k solid yellow gold (Au750). **Chain**: dainty chain about 0.7 mm wide. **Stone setting**: four-prong set. **Side stone **: you may choose to add a diamond halo to the design. **【About Precious Opal】** Opal is a hydrous silicon dioxide (SiO2.nH2O) and has a hardness of about 5.0 to 6.5. It is amorphous, without a crystalline structure, and without a definite chemical composition. Opal specimens that exhibit a play-of-color are known as Precious Opal. Precious opal flashes iridescent colors when it is viewed from different angles, when the stone is moved or when the light source is moved. Such unique optical phenomenon makes opal a popular gem. **【Understanding Gold Purity】** The purity of gold is measured in karats. Pure gold measures 24 karats but is too soft in this state to be used effectively in jewelry. So it is alloyed with other metals such as silver, copper, etc. to increase its strength and durability. Common measurements once the alloy is added are 18 karat (75% gold), 14 karat (58.5%), and 10 karat (41.7%). A higher karat measurement in gold content indicates a greater value of the jewelry piece. Gold jewelry is usually stamped with the karat mark such as 18K, K18 or 750 for 18-karat gold, and 14K, K14 or 585 for 14-karat gold.