Notes on stones, science and selection

The Casta Diva Journal

Practical English editions on diamonds, coloured gemstones and jewellery-making. New entries follow our publication calendar.

Oval diamonds: what length-to-width ratio changes

The same carat weight can produce a broader or a more elongated silhouette.

Diameter, tolerance, quality range and quantity make an order repeatable.

These terms do not all describe the same material. Clear naming starts with identity and origin.

Report number, measurements, colour, clarity and comments belong in your pre-order check.

Carat measures mass; length and width describe the dimensions you see from above.

All three are colourless grades. Exact specifications still matter when comparing quotations.