GIA-credentialed specialists
Kevin Keller holds the GIA Graduate Diamonds diploma. AJ Leonard is a GIA Graduate Gemologist and Graduate Jeweler; Anthony R. Zamonis is a GIA Graduate Gemologist.
MAXWELL PHILIP FINE JEWELERS
Choose a diamond from our vault or bring your own. Design the ring with GIA-credentialed specialists, approve it before anything is cut, and have it set at our own bench in San Diego.
4.9727 Google reviewsCompany-wide, across our Google profile
WHAT BRINGS YOU IN
Every piece is examined, priced and explained by the people you meet at the counter.
ENGAGEMENT RINGS
Most people arrive with one of two starting points. Some already have a stone, inherited or out of a ring nobody wears, and want it in something modern. Others want the diamond and the setting together, chosen with someone who grades stones for a living.
STYLES WE MAKE



Each was bought from a customer, authenticated by our team and photographed in our store. See what is in the Engagement & Bridal collection now.
WHY SHOP WITH US
Kevin Keller holds the GIA Graduate Diamonds diploma. AJ Leonard is a GIA Graduate Gemologist and Graduate Jeweler; Anthony R. Zamonis is a GIA Graduate Gemologist.
The specialists who examine and value your diamond are the people who set it, at our own bench in downtown San Diego.
We buy estate diamonds every day, so the stone in your ring is often one we own rather than one we broker for someone else.
Drawings first, then wax or CAD where the design warrants it. Nothing is cut until you approve the design and the number.
XRF metal analysis, diamond-screening instruments and gemological microscopes, explained to you as we use them.
Our San Diego store has served downtown since 2006 and holds an A+ rating with the Better Business Bureau.
SERVICES
Design, repurposing, restoration and repair, plus written appraisals, all at 907 Sixth Avenue.
Design around your diamond, or choose a stone from our vault. You approve the drawing and the price before any metal is cut.
Book a consultationPre-owned and estate rings, necklaces, bracelets, earrings and watches, photographed in our own store.
Shop the collectionBring a photo, a sketch or just an idea. We draw it with you and make it at our own bench.
Explore custom designKeep the stone that matters and lose the setting that dates it. A ring nobody wears can become one someone will.
Discuss a resetSizing, retipping, soldering, stone tightening, clasps, chains and watch bracelet links, quoted before we start.
Explore repairsInsurance appraisals prepared in house, typically in about a week. Bring your insurer’s requirements.
About written appraisals
OUR FLAGSHIP SHOWROOM
907 Sixth Avenue
San Diego, CA 92101
Monday to Friday, 10am to 6pm. Saturday by confirmed appointment. Sunday closed. Reserved customer parking in the ACE lot across the street.

Chief executive officer · GIA Graduate Diamonds
Kevin runs the store and is at the counter most days. He has graded diamonds since 1993 and is the team’s watch specialist, so a center stone he has looked at has been looked at by someone with three decades at it.

Founder, Maxwell Philip · Chief operating officer
Maxwell founded today’s Maxwell Philip brand and runs operations at our San Diego store. As Jeweler Maxwell he explains what pieces are worth and why, the same conversation he has at the counter.

GIA Graduate Gemologist · Graduate Jeweler
AJ pairs gemological examination with bench skills: gemstone identification, diamond grading, custom jewelry and stone setting. He is a good first conversation for an engagement ring or a reset.

GIA Graduate Gemologist
Anthony’s background spans diamond grading, gemstone sourcing, assessing treatments and guiding custom pieces from design through production.
QUESTIONS SHOPPERS ASK
PART OF THE MAXWELL PHILIP FAMILY
The same team buys jewelry, diamonds, gold and watches, and writes collateral loans. If an old ring is funding a new one, we can do both in one visit.
YOUR NEXT STEP
The consultation is free. Bring the stone, a photo of it, or just the idea.