Gemstone Certificate Guide (India, 2025)

What a Genuine Certificate Usually Includes

• Report number (unique ID you can verify on the lab’s website)

• Species & variety (e.g., Corundum – Yellow Sapphire / Pukhraj)

• Weight & dimensions (in carat and mm)

• Cut/shape & colour (oval, cushion, vivid yellow, etc.)

• Clarity / comments (inclusions, growth features)

• Treatments (e.g., heated, lead-glass filled, dyed, irradiated)

• Origin (if given) (e.g., Sri Lanka / Ceylon)

• Photo of the actual stone

The 7-Point Buyer’s Checklist

1. Check the lab name & credibility. Prefer reputed Indian or global labs. Avoid “in-house” or no-name paper slips.

2. Verify the report number online. Enter the number on the lab website; the carat, shape and colour must match your stone.

3. Match the photo & measurements. Dimensions and face-up outline should match the certificate photo.

4. Read the treatments line carefully. Heated is common for sapphires; avoid “lead-glass filled” rubies for astrological use.

5. Be realistic about origin. Origin is complex; be cautious if every stone claims “Burma/Ceylon” at low price points.

6. Look for QR code or security features. Modern reports often include scannable checks.

7. Cross-check with the seller. Ask for a return policy and WhatsApp photos/video under daylight.

Common Treatments (Quick Notes)

• Heat treatment (Sapphires/Rubies): Enhances colour/clarity—usually accepted, disclose required.

• Lead-glass filling (Rubies): Fills cracks; looks pretty but not durable for rings; avoid for astrology.

• Dyeing/Resin (Agates, Emeralds, Organic): Can alter colour; ask for disclosure.

• Diffusion/Beryllium: Alters colour layer—not preferred for astrological purpose.

Natural vs Lab‑Grown vs Simulant

• Natural: Formed in nature; value depends on colour, clarity, cut, origin.

• Lab‑grown: Same chemistry as natural but man‑made; great for jewellery budgets, not used for astro remedies.

• Simulant: Looks similar (e.g., glass, cubic zirconia) but different chemistry.

Pro Tips from Sandhya Gems

• Ask for daylight photos and ring-on-hand shots to judge face-up colour.

• For Jupiter’s stone, explore our Pukhraj (Yellow Sapphire) picks.

• Prefer open-back settings so light can enter the gem.

Shop the look

• Yellow Sapphire / Pukhraj →https://sandhyagems.in/collections/ruby-gemstone

• Emerald / Panna →https://sandhyagems.in/collections/emerald-panna-gemstone

• Ruby / Manik → https://sandhyagems.in/collections/ruby-gemstone

FAQ

Q1. Can I rely only on a certificate? Use it with price transparency, lab verification and a trusted dealer.

Q2. Is heated sapphire okay? Yes for jewellery and often acceptable for astrology; avoid glass‑filled or diffusion‑treated stones.

Q3. Can I get origin on every stone? Not always; origin determination is complex and costs more—focus first on colour and clarity.

CTA: WhatsApp us for free guidance on picking a certified stone and setting it as a ring or pendant.