Frequently Asked Questions

Some diamonds contain trace amounts of boron and nitrogen that cause them to emit a soft glow (most often blue, occasionally yellow or white) under ultraviolet light, including sunlight. In face-up view it's rarely noticeable; in a small minority of stones, strong blue fluorescence can make the diamond look slightly hazy or milky. It's worth asking about specifically if you're buying a higher-color stone.

Warm water, a few drops of dish soap, and a soft-bristled toothbrush, then rinse and dry with a lint-free cloth. Avoid ultrasonic cleaners on pieces with fracture-filled or heavily included stones, and avoid chlorine bleach entirely — it can pit gold settings and, over time, damage certain metal alloys.

Red. Fewer than 30 true red diamonds are known to exist, and most are under half a carat. Blue and pink follow as the next rarest widely recognized fancy colors.

Gold has a transparent, quoted spot price and functions closer to a commodity. Diamonds do not trade on a public exchange, and retail markup means a diamond's resale value is typically well below what you paid — regardless of stone quality. Neither should be treated as an investment vehicle; buy jewelry for what it is, not for appreciation.

On the standard GIA scale for white diamonds, grades run from D (colorless) to Z (light yellow/brown). Beyond Z, diamonds are graded on a separate "fancy color" scale that includes yellow, brown, pink, blue, green and, rarely, red and violet.

Gemologically, diamonds are classified as Type Ia, Ib, IIa, and IIb based on how nitrogen and boron are (or aren't) present in the crystal structure. Type IIa diamonds, which contain almost no nitrogen, are the chemically purest and often the most colorless and valuable.

You enter the price and specs (carat, cut, color, clarity, stone type) from a listing, and it compares that price against a transparent pricing estimate built from generally known market patterns — not a live feed from any retailer. It's a sanity check, not a guarantee, and it always tells you when a missing certification makes the comparison less reliable.

No. Every tool and guide is freely available without an account or personal information.