- IGI certified Each diamond is graded by IGI for cut, color and clarity.
- Solid gold Set in 14k or 18k gold. Never plated, never filled.
- Secure checkout Your payment details are encrypted from start to finish.
- Made for you Send us an idea and we will design the piece with you.
Shop by category
A familiar place. A personal welcome.
Your local jeweler.
Since 1873.
Find something special, bring in a treasured piece for repair, or explore our watches. Visit Mornhinveg & Castille Jewelers on Creswell Lane—we’d love to welcome you.
Store hours · Central Time
- Monday–Friday
- 9:00 AM – 5:00 PM
- Saturday
- 9:00 AM – 2:00 PM
- Sunday
- Closed
Have it made for you
Tell us the idea
Share a sketch, a photo or a description, with your budget and the date you need it.
We make it at the bench
Once you approve the drawings and the quote, the piece is made in 14k or 18k gold.
Yours to wear
The finished piece is checked against the drawing, then sent to you.
Talk to someone who sets stones
Questions about size, grade or metal are easier to answer in a conversation than on a page. Write to us and a jeweler, not a script, replies.
Ask a jeweler- Choosing between two pieces
- Send us both and we will tell you what the difference in price buys.
- Sizing and resizing
- How to measure at home, and what can be adjusted later.
- Care and repair
- Cleaning, checking prongs and restoring a worn finish.
Under $500
Real diamonds in solid gold, each one under five hundred.
Plain answers about diamonds
The things people ask before they buy, answered in ordinary words.
Size guide
How big is a carat?
Round diamonds drawn to scale with each other, next to a US dime, so a weight on a page becomes a size on a hand.
Diameters are typical for a well-cut round diamond.
- ¼ ct 4.1 mm
- ½ ct 5.1 mm
- ¾ ct 5.8 mm
- 1 ct 6.5 mm
- 1½ ct 7.4 mm
- 2 ct 8.1 mm
- 3 ct 9.3 mm
- Dime 17.9 mm
Grades What GH SI and DE VVS mean
Color and clarity grades in ordinary words, and which ones you can see.
Origin Lab-grown and mined
The same material, made two ways. What differs is price and origin.
Care Keeping a diamond bright
What dulls it, how to clean it at home and when to have it checked.
Fit Finding your ring size
Measure at home in two minutes, and what can still be adjusted after.
Shop by price
Every band is real diamond in solid gold. Start from what you want to spend.
Gifts that get worn.
One bracelet, every day A tennis bracelet sits flat, stacks with a watch and never needs to come off. Read more
Rings that stack Start with one band and add to it. Matching the metal matters more than the stones. Read more
Necklaces in layers Two lengths about two inches apart keep the stones from tangling. Read more
Studs, all week A quarter carat each reads as a clean point of light, not a statement. Shop studs
A band on its own An eternity band worn alone is the quietest way to wear a full circle of diamonds. Shop bands
The first layer A solitaire pendant on an 18-inch chain is the piece everything else is layered over. Shop pendants
For the wedding
Engagement rings, bands and matched sets.
Before you buy
The questions we are asked most.
Yes. A lab-grown diamond is carbon in the same crystal form as a mined one, with the same hardness and sparkle. It is graded on the same color and clarity scales.
Mornhinveg & Castille on Facebook
From our store, in motion.
Here to help
