London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape

London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape

SteelBlue / Oval Cabochon / 16 - 17 Carats
AED 716.40
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London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
  • London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape
London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape

London Blue Topaz 16.28 Carat 15.5X12.5mm Oval Cabochon Shape

AED 716.40
ColorSteelBlue
ShapeOval Cabochon
Carats Weight16 - 17 Carats

Ring Size Guide

The easiest way to find your ring size is to measure a ring that already fits the same finger well, then match it on the chart below. If you have no ring to hand, a strip of paper and a ruler work too.

Raza Gems ring size chart with inner diameter and size conversions

How to measure your ring size at home

  1. Use a ring that fits: lay it on a ruler and measure the inside diameter, edge to edge, in millimetres. Match that number on the chart.
  2. No ring? Use paper: wrap a thin strip of paper around the base of your finger, mark where it overlaps, and measure the length in millimetres. That is your finger's circumference.
  3. Measure twice: do it at the end of the day, when fingers are a little larger, and avoid very cold hands.

Tips for the right fit

  • Knuckles: the ring must slide over your knuckle. If your knuckle is wider than the base of your finger, choose a size between the two.
  • Wide bands: a wide band or a signet ring feels tighter, so many people go half a size up.
  • Between sizes: pick the larger one. A ring can be made slightly smaller more easily than larger.
  • Gift and not sure? Borrow a ring the person wears on the same finger, or tell us and we will help you choose.

Still unsure? Send us a photo of your measurement on our contact page, or visit one of our Dubai showrooms and we will size your finger in a minute. For made-to-order pieces, see custom orders.
Description

Here is a 16.28 carat London blue topaz, cut as an oval cabochon of 15.5 x 12.5 mm. The steel blue stone comes from Africa and has an IDL lab report.

Stone summary

  • Gem: London blue topaz
  • Cut: Oval cabochon
  • Weight: 16.28 carats
  • Dimensions: 15.5 x 12.5 mm
  • Colour: Steel blue
  • Origin: Africa
  • Lab report: IDL

Rounder than most ovals

At 15.5 x 12.5 mm, this cabochon is closer to round than a long oval. That makes it sit nicely as a pendant on a short chain or as a wide ring top.

Day-to-day care

Clean it with warm soapy water and a soft cloth. Store it apart from other gems so the smooth dome does not get scratched.

The steel blue tone sits nicely with grey, navy and white clothes, so a piece made from it is easy to wear to work.

Learn about our checks on the gemstone authentication page.

About Topaz

Topaz is an aluminium silicate found colourless and in yellow, orange, pink and blue. Imperial topaz is the orange to pinkish orange type, while most blue topaz is treated colourless topaz.

  • Mineral: Topaz
  • Hardness: 8 on the Mohs scale
  • Main sources: Brazil, Sri Lanka, Pakistan, Nigeria, Madagascar
  • Treatments: Nearly all blue topaz is irradiated and heated, and some topaz is coated; ask us for the lab report on any stone to see its treatment.
  • Care: Topaz is hard but can split along its cleavage, so avoid hard knocks, ultrasonic cleaners and sudden heat.

Buying from Raza Gems: in Dubai since 2005, lab reports on major stones, 30-day returns and insured worldwide shipping.
Shipping & Delivery

Delivery: UAE AED 25, 3–5 working days. Worldwide AED 199, 5–10 working days, tracked and insured.

Dispatch: loose stones in 1–2 business days, ready-made jewellery in 2–3.

Full shipping policy
Returns & Authenticity

30-day returns: loose stones and ready-made jewellery can be returned within 30 days of delivery, unused, with their certificate and packaging.

Authenticity guarantee: if a recognised lab finds a stone is not as described, we refund the full price and the lab fee.

Made to order: custom pieces can't be returned unless faulty.

Full returns & refunds policy

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