Platinum is a rare precious metal found primarily in South Africa and Russia.

Not only is it rare, its specific metallic properties are also unique. 

Platinum is very ductile, one-ounce can produce a wire which measures a mile long and it is so pure that when worn it’s completely hypoallergenic. The metallic properties, which make platinum perfect for jewelry use, are high tensile strength and durability—a secure way for setting precious stones.


Platinum’s greyish white luster will never fade and when scratched the metal will not wear away as gold, therefore the jewelry can last forever. Intricate designs can be created from platinum because of the strength and durability as opposed to gold or silver, which have softer metallic properties.


Platinum is 95% pure platinum when it is used for jewelry and will be hallmarked with stamp Pt. 950 within a diamond shaped logo.

For more information regarding precious metals contact

Jeff Deleuse, Graduate Gemologist and Certified Jewelry Appraiser

 Deleuse Jewelers in Fairfax, CA


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“Janet, thank-you for everything you do. As I said before, you are truly an artist, and that is why it is so special buying jewelry from you.” Peter, Atlanta, GA

” Beauty, exquisite design, pleasant and personalized attention. These qualities have been constant in our 20 years of shopping with Janet and Jeff Deleuse – Two exceptionally talented and caring people. The Best!’ Helen P.,Belvedere

"This store has a very pleasant environment and Jeff and Janet are both kind, wonderful people. I used Jeff a few times for appraisals and he was very thorough and was happy to answer lots of questions. He uses scientific methods and tests rather than going solely by appearance as some jewelers will try to do, and his expertise is well respected. On one occasion, he even went out of his way to help expedite a deal for me. He has my highest recommendation. Suzanne T., San Rafael, CA

“Jeff is an incredible gemologist who knows everything there is to know about gem stones. He is a true professional and can be trusted. The quality of their work is impeccible and always consistent. I would recommend Deleuse Jewelers to anyone looking for a new, “bauble,” for themselves or someone special!” Terri B., Ross

"I have used Deleuse Jewelers for many years - for everything from purchasing jewelry to repairing jewelry to getting appraisals on jewelry. Their service and work is superb. I highly recommend them." Suzanne S., Tiburon, CA

"I purchased this beautiful chain from Janet Deleuse about 3 weeks ago. It was an online purchase so I was hoping I would be pleased. It exceeded my expectations as it was exactly as pictured. Delicate and perfectly crafted. Packing was very secure and shipping was quick. I would not hesitate to purchase from Deleuse again! Michele, New Jersey

“Janet and Jeff designed and crafted our wedding rings and did a great job. They worked with existing diamonds we had in an antique ruby cocktail ring, added the sapphire stone and made a beautiful pendant with the ruby. In addition, they designed earrings for our daughters. All are still in great shape today. They are easy to work with and very reliable and trustworthy.” Peg M., San Anselmo

Accreditation includes diplomas from the Gemological Institute of America and the American Gem Society and thirty years of experience.

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