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1172 Kansas Avenue
Modesto, CA 95351
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Visit the showroom
1172 Kansas Avenue
Modesto, CA 95351
Client Experiences
These are unedited beyond spelling and length — from private collectors, jewelers we supply, and first-time buyers who wanted a second opinion before they trusted anyone with a large purchase.
Average client rating
Verified reviews on file
Of clients who buy again
Typical response time
"I'd been quoted three different clarity grades for the same 2.1-carat stone by three different shops before I found K2. Mr. Kablanow walked me through the inclusions under the loupe himself, explained why the earlier grades were off, and sent the stone to GIA at his own cost to prove it. It came back matching his call exactly. That's the kind of thing you can't fake, and it's why I've since bought two more pieces from them without asking a single question."
Daniel R.
Private collector · Sacramento, CA · Diamond purchase, verified GIA submission
By Category
"Bought my fiancée's engagement stone here after getting sticker shock at two mall jewelers. K2 showed me the exact same cut, color and clarity grade at nearly a third less, and explained why — no store overhead, no upsell commission. The ring came insured and the tracking updates were constant. Zero regrets."
Jason M.
Turlock, CA · Round brilliant, 0.95ct
"Inherited my grandmother's ring and had no idea what it was worth or if the stone was even real. K2 fit me in within a week, gave me a written appraisal for insurance the same day, and didn't try to pressure me into selling it to them, which I appreciated more than I expected to."
Christine O.
Modesto, CA · Estate appraisal
"I deal rubies for my own shop in Fresno and I'm picky about who I buy parcels from. K2's heat-treatment disclosure is more thorough than most labs I've worked with — they flag even minor clarity enhancement most dealers gloss over. Reordered twice this year."
Aleena T.
Independent jeweler · Fresno, CA
"Wanted an unheated sapphire specifically and most places either didn't carry them or couldn't prove it. K2 had documentation on origin and treatment status before I even asked. Paid more than a heated stone would've cost, went in knowing exactly why, and I'm glad I did."
Rahul P.
Stockton, CA · Unheated blue sapphire
"Emerald I bought had more visible jardin than I expected from the photos, but when I called they were upfront that natural inclusions are normal for the stone and offered an exchange with no hassle. I kept it in the end — once I understood what I was looking at, I actually liked it more."
Sofia K.
San Jose, CA · Colombian-style emerald pendant
"Buy gold periodically as part of my portfolio and K2 prices against the daily spot rate transparently instead of some marked-up house number. Picked up in person, they weighed it in front of me, no games."
Walter H.
Manteca, CA · 24K bullion
"Live out of state, so I did the whole process over video call — Mr. Kablanow held the stone up to a loupe camera and walked me through the facets live. It felt more thorough than most in-person appraisals I've had honestly. Diamond arrived exactly as described."
Michelle E.
Reno, NV · Remote purchase, oval cut
"Brought in three loose stones I'd bought online over the years, half expecting bad news. Got a straight answer on each — one was exactly as advertised, one was overgraded, one was a treated stone sold as untreated. Wish I'd come here before I bought them, not after."
George F.
Ceres, CA · Multi-stone evaluation
"Ordered a ruby cabochon sight-unseen based on the description alone. Color and cut matched exactly, and the enclosed grading notes were more detailed than I asked for. Small thing, but the box it shipped in was genuinely nice too."
Lena N.
Tracy, CA · Ruby cabochon
"Sold K2 a sapphire I inherited rather than buying from them, actually. Their offer came with a clear breakdown of how they arrived at the number, which was more than I got from two other buyers I approached first. Paid within two days of agreeing."
Priya V.
Elk Grove, CA · Sold a pink sapphire
Every review above ties back to a graded, disclosed transaction
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