The Gemstone Journal

ALL NEW ITEMS SEPTEMBER 12TH! Aquamarine and Ruby Zoisite! We invite you to explore our site and find a piece that speaks to you!

Untreated vs. Treated Gemstones: What Buyers Should Know

gemstone authenticityMark Oliver GemsOct 02, 2026

Untreated vs. Treated Gemstones: What Buyers Should Know

gemstone authenticityMark Oliver GemsOct 02, 2026

Order Processing Times

Gemstones, Earrings and Pendants will ship between 5-7 business days.

Rings will ship within 1-3 weeks as we make all rings ordered to size.

Mark Oliver Gems

76 Broadway

Suite 102A, Room 1

Denville, NJ 07834

Mon, Tue, Wed, Fri: 10:30AM - 3:00PM
Thursday: 12:00PM - 7:00PM
Saturday and Sunday: By Appointment

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Untreated vs. Treated Gemstones: What Buyers Should Know

Untreated vs. Treated Gemstones: What Buyers Should Know

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Order Processing Times