Why Trust Pro Diamond Buyers
When you are selling diamonds, gold, estate jewelry, luxury watches, coins, bullion, rare gemstones, or other valuable items, the experience and qualifications of the buyer matter. Pro Diamond Buyers combines professional gemological training, nearly half a century of jewelry-industry experience, an in-house gemological laboratory, and extensive knowledge of diamonds, fine jewelry, precious metals, Swiss watches, and luxury goods.
Our Folsom office serves customers throughout Sacramento and surrounding Northern California communities in a private, appointment-only setting. Our goal is to identify what you own accurately, explain the factors that influence its value, and provide a competitive offer without pressure to sell.
Meet the Gemological Team at Pro Diamond Buyers
Pro Diamond Buyers is supported by a team with professional gemological training and extensive hands-on experience evaluating diamonds, gemstones, fine jewelry, estate pieces, precious metals, coins, bullion, watches, and other valuables.
Mark Tanzi — Master Jeweler, Certified Gemologist & Graduate Gemologist with Honors
Mark Tanzi grew up in the jewelry and gemstone industry and has spent nearly half a century working with fine diamonds, rare gemstones, luxury jewelry, precious metals, Swiss watches, and exceptional estate pieces. His experience extends far beyond buying jewelry from the public. Throughout his career, Mark has worked as a master jeweler, gemologist, diamond and colored-stone dealer, jewelry manufacturer, designer, wholesaler, and buyer.
Mark is a Graduate Gemologist with Honors from the Gemological Institute of America (GIA) and earned the prestigious Certified Gemologist designation through the American Gem Society (AGS). His combination of formal gemological education, master jeweler experience, jewelry manufacturing knowledge, and decades of hands-on work allows him to evaluate valuable items from both a gemological and commercial perspective.
Over the course of his career, Mark has sold rare gemstones, fine diamonds, luxury jewelry, watches, and other high-value items in major markets throughout the United States. His work has also taken him internationally, including travel to remote gemstone-producing regions where he has examined, sourced, and purchased rare gemstones and jewelry.
His professional background and additional history can be found on MarkTanzi.com and on his Pro Diamond Buyers gemologist profile.
Boston — Graduate Gemologist, Former Senior Diamond Grader & Richard T. Liddicoat Award Recipient
Boston is a Graduate Gemologist from the Gemological Institute of America (GIA) and brings years of professional diamond-grading experience to the Pro Diamond Buyers team. His background includes work as a Senior Diamond Grader within the GIA gem trade laboratory environment, evaluating diamonds according to rigorous professional gemological standards.
Boston was also the recipient of the prestigious Richard T. Liddicoat Award, an exceptional distinction presented to only one recipient worldwide each year. Receiving this honor reflects the high level of professionalism, gemological achievement, and personal distinction he demonstrated during his time with GIA.
That combination of formal gemological education, senior laboratory grading experience, and distinguished recognition provides an important additional level of expertise when examining loose diamonds, diamond jewelry, certified stones, estate diamonds, and unusual or higher-value diamond pieces.
Miles — Professionally Trained Diamond Grader
Miles completed professional diamond-grading education and training while in residence at the Gemological Institute of America (GIA). His specialized training contributes additional expertise in diamond identification, grading, quality analysis, and evaluation.
Together, the team provides customers with multiple levels of professional gemological knowledge rather than relying solely on precious-metal weight or a basic visual inspection.
A Full In-House Gemological Laboratory
Pro Diamond Buyers maintains a full gemological laboratory at our Folsom office for gemstone and diamond identification and evaluation. We use modern professional gemological equipment to assist with the examination and identification of diamonds, gemstones, jewelry, and unusual or complex pieces.
-
- Professional diamond and gemstone evaluation equipment used by the Pro Diamond Buyers team.
This capability is particularly valuable when evaluating estate jewelry, inherited collections, rare gemstones, significant diamonds, designer jewelry, and items whose value cannot be determined by precious-metal content alone.
Combining professional equipment with decades of practical jewelry and gemological experience allows our team to examine important items carefully before determining how they should be valued.
Nearly Half a Century of Jewelry Manufacturing Knowledge
Mark’s experience as a master jeweler and jewelry manufacturer adds another important dimension to the evaluation process. Understanding how jewelry is designed, manufactured, assembled, repaired, and finished can provide information that is easy to miss when an item is evaluated only for its gold weight or the size of its gemstones.
Construction quality, workmanship, setting techniques, materials, design, age, condition, maker, and manufacturing methods can all contribute to the character and potential value of a piece.
This knowledge is especially useful when evaluating antique jewelry, estate jewelry, custom-made pieces, signed jewelry, designer jewelry, and unusual items that may deserve more consideration than their scrap value alone.
Extensive Swiss Watch and Luxury Timepiece Knowledge
Mark also has extensive knowledge of fine Swiss watches and luxury timepieces developed through decades of experience in the fine jewelry and luxury-goods industry.
Evaluating an important watch involves much more than determining whether its case contains gold. Brand, model, reference, movement, originality, condition, age, rarity, dial, bracelet, accompanying documentation, service history, and current market demand can all influence its value.
This experience allows Pro Diamond Buyers to evaluate significant Swiss watches and luxury timepieces as complete marketable and collectible items rather than simply treating them as precious-metal scrap.
Trusted by Customers and the Jewelry Trade
Our experience is not limited to transactions with the public. Other jewelers, dealers, buyers, and jewelry-industry professionals have also relied on Pro Diamond Buyers when a project requires additional gemological knowledge, diamond expertise, jewelry manufacturing experience, luxury-watch knowledge, market connections, or assistance identifying and evaluating unusual or higher-value pieces.
That dealer-to-dealer experience is an important part of who we are. In many situations, we are the resource other professionals turn to when they encounter something that requires additional expertise.
Our reputation with the public has been built the same way: one evaluation and one transaction at a time. Customer feedback consistently reflects the importance of knowledge, professionalism, clear explanations, fairness, and a comfortable no-pressure experience.
We Evaluate More Than Precious-Metal Weight
Many pieces of jewelry contain value that can easily be overlooked when they are evaluated only for their gold, platinum, or silver content.
At Pro Diamond Buyers, items are examined individually so that diamonds, colored gemstones, signed jewelry, designer pieces, watches, collectible coins, rare items, and other potentially valuable components can be considered appropriately.
This becomes especially important when evaluating inherited jewelry and complete estates, where one collection may contain pieces with dramatically different levels of quality, rarity, and value.
What Pro Diamond Buyers Purchases
We purchase a broad range of valuables including gold jewelry, scrap gold, platinum, silver, loose diamonds, engagement rings, diamond jewelry, estate jewelry, antique jewelry, designer jewelry, luxury watches, rare gemstones, gold coins, silver coins, bullion, and other precious items.
Visit our What We Buy page to see more of the items we purchase.
Professional Diamond Evaluation
Diamonds require specialized knowledge and access to current market information. An accurate evaluation considers much more than carat weight. Cut, color, clarity, proportions, fluorescence, certification, condition, rarity, market demand, and other characteristics can all influence value.
Our gemological team evaluates loose diamonds, engagement rings, certified diamonds, diamond jewelry, estate diamonds, and significant individual stones.
Customers considering selling a diamond can learn more on our Sell Your Diamonds page.
Professional Gold and Precious Metals Evaluation
Gold and other precious metals are evaluated according to purity, weight, current precious-metal markets, and the characteristics of the individual item. Jewelry containing important diamonds, colored gemstones, designer signatures, collectible features, or exceptional workmanship may be worth considerably more than its metal value alone.
Customers throughout the greater Sacramento area can learn more about our gold-buying services on our Sacramento Gold Buyer page.
Estate Jewelry and Inherited Collections
Inherited jewelry can be particularly difficult to evaluate because owners may not know which pieces are valuable, whether gemstones are natural or genuine, whether a piece has designer or historical significance, or whether something has value beyond its gold content.
Our team can evaluate individual pieces or larger collections and explain what we find during the process. Our goal is to identify the important characteristics of a collection before an offer is made rather than treating everything as scrap metal.
Private, Appointment-Only Evaluations
Pro Diamond Buyers operates from a private professional office rather than a traditional pawn-shop environment. Appointments allow us to give customers personal attention while valuable items are examined in a secure and comfortable setting.
There is no obligation to sell. Customers are encouraged to ask questions, understand what they own, and decide whether an offer is right for them.
Serving Sacramento and Surrounding Northern California Communities
Our Folsom office serves customers from Sacramento, Folsom, Roseville, Granite Bay, Fair Oaks, Carmichael, Elk Grove, El Dorado Hills, Auburn, Placerville, and surrounding Northern California communities.
Customers often travel to Pro Diamond Buyers because specialized gemological evaluation can be particularly important when selling higher-value diamonds, estate jewelry, rare gemstones, designer pieces, luxury watches, coins, bullion, and inherited collections.
Why Experience Matters
The value of a diamond, gemstone, watch, or piece of jewelry cannot always be determined with a scale and a calculator. Proper evaluation can require gemological knowledge, jewelry manufacturing experience, diamond grading expertise, identification skills, luxury-market knowledge, and an understanding of current resale markets.
Our goal is to make sure important characteristics are identified before an item is priced.
A No-Pressure Approach
We believe customers should understand what they own before deciding whether to sell it. During an evaluation, we can explain the characteristics that influence value and answer questions about the item and the market.
An evaluation is not a commitment to sell. Our objective is to provide professional information and a competitive offer so that each customer can make an informed decision.
Why Customers Choose Pro Diamond Buyers
- Nearly half a century of jewelry-industry experience
- Certified and professionally trained gemological expertise
- Graduate Gemologist and professional diamond-grading experience
- Master jeweler and jewelry manufacturing knowledge
- Extensive Swiss watch and luxury timepiece knowledge
- Full in-house gemological laboratory
- Modern professional gemological equipment
- Diamond, gemstone, jewelry, precious-metal, coin, bullion, and watch expertise
- Experience assisting other jewelers and industry professionals
- Private, appointment-only evaluations
- Competitive offers based on current markets
- No-pressure environment
Visit Pro Diamond Buyers
If you are considering selling diamonds, gold, estate jewelry, rare gemstones, luxury watches, coins, bullion, or an inherited collection, Pro Diamond Buyers can provide a professional evaluation and explain the factors that influence value.
Pro Diamond Buyers
Folsom, California
Phone: 916-586-0773