Wayne D. Prentice, G.G.


Graduate Gemologist - GIA

Former GIA Resident Education Gemology Instructor

(Colored Stones & Gem Identification)

Master Gem Cutter - AGTA "Cutting Edge Award" Recipient

A profesional's expert understanding of diamonds and gemstones can only be gained from extensive experience. Wayne Prentice brings a lifetime of knowledge, skill and a impeccable reputation to his work as a Gemologist. His story began in 1986 after graduating with a Degree in Business Economics from UCSB, Wayne ended up at GIA in Santa Monica to learn from world's foremost authority on Diamonds, Colored Gems, Pearls and Jewelry, launching his career as a Gemologist. "I was passionate, fell in love with the industry, so I dove in beyond GIA's Resident Gemology curriculum, tapping all available resources & people at GIA ...in the Library, their Gem Trade Lab, Research Departments and Phd Scientists. Also, after receiving my Graduate Gemologist credentials, I was very fortunate GIA offered me a highly coveted position, to be trained to become a Residence Gemology Instructor, which I accepted."

Prentice after leaving GIA Education, with a commitment to excellence and entrepreneurial spirit, opened a retail jewelry store in Santa Barbara, California and founded FINEGEMS wholesale gem brokerage and gemological consultancy in the 90's. "I've traveled the world built a strong network, worked with the best people and clients ..large and small; private and corporate" Prentice shares. "I'm fortunate to work with the most beautiful diamonds and gemstones in the world and build long term relationships with all my clients, from first time buyers purchasing a gift worthy of a special occasion, to sophisticated investors seeking only the rarest of gems as a store of value and celebrity clientele." Prentice adds "my philosohy is I work as a fiduciary agent, placing the client's needs foremost in business."

Today, Prentice uses his unique expertise and deep connections as he sources and provides gemological services with utmost discretion for private and corporate clientele. "This business is all about Trust, Privacy and Integrity," says Prentice. "I provide only responsibly sourced, compliant, conflict free fair traded gems & sourced metals in quality manufactured jewelry. Not only do I source the best match to my client's specifications from my global network, but each purchase's basis, wholesale costs plus my fees are fully disclosed, each transaction purposely simple and transparent. It takes a true expert to select which gems & jewerly qualify as Luxury Investments, enduring hard assets of mobile wealth of exceptionally beautiful. I'm the client's gem expert first and foremost, who creates a win-win scenario balancing their items' costs with my professional services & fees; which is how all fine gem & jewelry transactions should be."

  • Luxury


Diamonds renowned for their hardness, ability to reflect light and unsurpassed brilliance; rarity equals value. Colorless diamonds in the normal range (GIA's D-L color range), value is based on the absence of color and inclusions, where "Excellent Cut" faceted optically perfect, absolutely pure colorless flawless diamonds are the rarest (D/FL XXX Grading).

Fancy Colored diamonds, face up a distinct color hue most commonly yellow; with the rarest and most valuable colors are saturated vivid pinks to reds, blues, and greens. In all cases, even very slight color differences can have a big impact on value. Compared to fancy yellows and browns, diamonds with a noticeable hint of any other pure hue (orange, purple, violet) are considerably more rare. Even in light tones and weak saturations, as long as they show color in the face-up position, they qualify as fancy colors. Red, green, and blue diamonds with medium to dark tones and moderate saturations are exceptionally rare and are valued in the millions.


Blue sapphires hold a captivating history and tremendous value. Originating from Kashmir, Myanmar (Burma), Sri Lanka (Ceylon), and new sources like Madagascar and Mozambique, with each geologic origin possessing distinct qualities.

Kashmir sapphires, scarce and highly prized, offer a velvety, cornflower-blue hue. Burmese sapphires are known for their intense blue color and silky appearance. Sri Lankan sapphires, ranging from light sky blue to deep royal blue, exhibit transparency and brilliance. Meanwhile, sapphires from Madagascar and Mozambique present a diverse range of shades, from vivid to pastel. Regardless of origin, blue sapphires enchant with their enduring charm, symbolizing wisdom, loyalty and nobility; and continue to captivate gem enthusiasts worldwide.

Photo Credit: Christie's exceptional "Sunrise Ruby" 25.59 carat Burma ring by Cartier sold May 10, 2023 for CHF 13,055,000


Ruby, the red variety of corundum, originating from esteemed sources as Burma, Thailand, Sri Lanka, Madagascar, and Mozambique; share a remarkable connection with their sibling, the sapphire.

Corundum, in its purest form, is colorless (crystalline AL2O3). However, the presence of chromium impurities gives rise to the mesmerizing red hues that define rubies. Remarkably, sapphires also belong to the corundum family, encompassing a spectrum of vibrant colors, except for red, which is exclusively reserved for rubies.

Burmese rubies exude a legendary allure, captivating with their fluorescent "Pigeon Blood Red." Thai rubies boast a vibrant red hue, while Sri Lankan rubies display fiery brilliance. Mozambique and Madagascar offer a newer chapter, presenting rubies with their own distinct characteristics, from purplish-red tones to captivating reds with pink undertones.


Emeralds, renowned for their captivating green allure, hold a rich history, fascinating lore, and remarkable geological rarity that distinguishes them from other gemstones. Cherished for centuries, emeralds were treasured by ancient civilizations like the Incas and Egyptians, who attributed mystical and healing properties to these gems. The vivid green color of emeralds is derived from the presence of chromium and vanadium in the beryl mineral (crystalline Be3Al2Si6O18). However, what truly sets emeralds apart is the accepted presence of "the garden," a mesmerizing array of inclusions within the gemstone. These natural inclusions that are identifying characteristics to the gemologist viewed under magnification; often resembling delicate foliage, lend character and uniqueness to each emerald, making them all the more enchanting. Despite the presence of inclusions, emeralds continue to captivate with their beauty, symbolizing renewal and growth. Their geological rarity, found in only a handful of locations worldwide, further elevates their desirability. As an emblem of elegance and natural splendor, emeralds remain a cherished gemstone, fascinating collectors and connoisseurs alike.

"Caveat Emptor"

In the era of misrepresented gems, financial scams, advanced enhancements, and laboratory-grown gemstones, the adage "Caveat Emptor" or "Buyer Beware" holds utmost importance. To navigate this intricate landscape, it is crucial to enlist the expertise of a knowledgeable gemologist who can safeguard your interests. When using our expertise, we will identify any enhancements, verify the certifications are from reputable gemological laboratories, and provide you guidance on the optimal timing to procure or sell your gemstones at best value.

Beyond the traditional "Big Four" gemstones of diamond, ruby, sapphire, and emerald, there is a world of other fine gems offering a vast spectrum of options. From mesmerizing blue Cuprian "Paraiba" tourmalines to rare green "Tsavorite & Demantoid"garnets and captivating change-of-color "Alexandrite" chrysoberyls, there is a treasure trove of choices available. Just as you would retain a lawyer in a court of law, engaging a professional gemologist in your next significant gem purchase is vital. Our team of gemologists and strategic partners serve as your advocate & agent, ensuring you make confident informed decisions and safeguarding the value of your investments in these exquisite natural wonders.

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