How We Test Your Gold in Houston — Accurate & Transparent

Artículo publicado en: 3 sept 2026 Autor del artículo: Afshan SEO
Todo Noticias
How We Test Your Gold in Houston

When you walk into TJ Diamond Houston with your gold, the first thing we do is test it. Every piece, every time — in front of you, with results you can see in real time.

We use XRF (X-ray fluorescence) technology — the same method used by US government agencies, assay offices, and professional gemological labs. It is accurate, fast, and completely non-destructive. No acid. No scratching. No damage to your jewellery.

What Is XRF Testing?

XRF stands for X-ray fluorescence. The machine directs a small beam of X-rays at the surface of your gold. Gold atoms absorb this energy and re-emit it at a unique wavelength. The machine reads that wavelength and calculates the precise gold percentage in the alloy — within seconds.

The result: an exact purity reading. 41.7% for 10k gold. 58.3% for 14k. 75.0% for 18k. 99.9% for pure 24k. No guesswork — just chemistry.

Why TJ Diamond Uses XRF Instead of Acid Testing

Acid testing — the older method — involves scratching your jewellery against a testing stone and applying chemicals to observe the reaction. It is imprecise, slightly damaging, and slow. XRF replaced acid testing in professional gold buying because:

  • It is non-destructive — your jewellery is not scratched or damaged in any way.

  • It is more accurate — precise to two decimal places rather than a rough karat estimate.

  • It is faster — results in under 60 seconds versus several minutes per piece.

  • It is objective — the machine gives the same result every time for the same piece.

  • It works on plated items too — XRF immediately identifies gold plating over a base metal, which acid testing can miss.

The Houston Testing Process

  1. Walk into our Houston location — no appointment required. Bring your gold and a valid photo ID.

  2. We place each gold item into the XRF machine, one at a time, in front of you.

  3. The test runs for 15 to 60 seconds per piece. You see the readout: exact gold percentage and all other metals present.

  4. We weigh each piece on certified precision scales — to the nearest 0.01 gram.

  5. We calculate your offer: weight × gold purity × today's USD spot price, minus any non-gold components.

  6. We present the full calculation on screen. You see every number. You verify it yourself if you like.

  7. You accept or decline. No pressure either way.

Texas-Specific Note: Why Testing Matters

Texas has a strong and active second-hand gold market. Houston in particular sees gold from many cultural backgrounds — Middle Eastern 21k and 22k jewellery, Mexican gold coins, Indian 22k pieces, and US estate gold ranging from 10k to 18k.

XRF testing is the only accurate way to distinguish between these karats, especially for items without a visible hallmark stamp. Acid testing cannot reliably distinguish between 21k and 22k gold, for example — XRF can.

All XRF testing at TJ Diamond Houston is free. There is no charge for testing, no obligation to accept an offer, and no minimum amount. Bring any gold you have and we will tell you exactly what it is worth today.

 

Compartir: