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https://www.bluenile.com/education/metal/cobalt
Made from a highly durable alloy, cobalt is four times harder than platinum while at the same time, less dense. Because of its natural hardness, cobalt jewelry is extremely scratch, chip and corrosion-resistant. Its lower density and natural malleability allow for strong, dynamic designs with less weight.
https://www.tungstenworld.com/Cobalt-Rings-Faq/
Made of a highly durable cobalt alloy that has been used in medical implants and the dental industry for years, cobalt jewelry employs the same cobalt chrome alloy from these industries for its extreme strength and high resistance to scratching.
https://www.etsy.com/market/cobalt_jewelry
Did you scroll all this way to get facts about cobalt jewelry? Well you're in luck, because here they come. There are 36479 cobalt jewelry for sale on Etsy, and they cost $21.30 on average. The most common cobalt jewelry material is glass. The most popular color? You guessed it: blue.
https://www.tungstenworld.com/Cobalt-Rings-Info-Specs/
Cobalt Jewelry is the perfect combination of high scratch resistance and shatterproof in an everyday ring, making cobalt wedding bands perfect for the most important ring you’ll ever wear. Gold rings can scratch easily and even bend out of shape over time.
https://www.jewelryshoppingguide.com/cobalt-men-wedding-ring-guide/
Cobalt, in its pure form, cannot be used in jewelry. As a result, cobalt is alloyed with other metals to make it stronger, more malleable and more wearable. Cobalt used in jewelry is often alloyed with metals such as chromium, tungsten and iron. Because the chromium content can be quite high, cobalt is also known as cobalt chrome.
https://www.amazon.com/cobalt-blue-jewelry/s?k=cobalt+blue+jewelry
Handmade jewelry from Hawaii, purple blue cobalt sea glass Necklace+Earrings Set, (Hawaii Gift Wrapped, Customizable Gift Message) 4.7 out of 5 stars 6. $63.98 $ 63. 98. FREE Shipping +25 colors/patterns. Leafael. Infinity Love Heart Pendant Necklace with Birthstone Crystals for 12 Months, Jewelry Gifts for Women, Silver-Tone, 18"+2"
https://www.techformcasting.com/platinum-jewelry-casting-house/jewelry-alloys/
Platinum 95% Cobalt 5%. This is an excellent casting alloy that has higher as-cast density than other mainstream jewelry alloys. Unlike PtRu and PtIr, it will oxidize when exposed to high temperatures and it is slightly magnetic, therefore bench jeweler techniques must take this into account.
https://www.stuller.com/articles/view/why-use-platinum-cobalt-alloy/
Jul 28, 2021 · For example, this Pt-Co alloy was developed more than 20 years ago and has been used extensively in Europe and Japan for jewelry. It’s not new, and it was developed specifically to perform better in jewelry casting than either Platinum-Iridium (Pt-Ir) or Platinum-Ruthenium (Pt-Ru).
https://www.whiteflash.com/jewelry-education/an-overview-of-common-alloys/
Unlike other platinum alloys, this one tarnishes when heated so it needs flux and pickling after soldering just like gold. Since Cobalt is a ferrous metal, not from the platinum group, its scraps must be kept separate from other platinum scraps. It takes a fast polish but finishes darker gray than iridium alloys.
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