Lab-Grown Diamond Open Heart Necklace in 14K Yellow Gold (3/4 ct. tw.), 18 Inch

Product Overview
Warm yellow gold frames a row of round lab-grown diamonds in this open heart necklace, a polished piece with a soft glow. The heart is made in solid yellow gold with a smooth, high-polished finish that lets the stones catch the light. It hangs from a fine cable chain that closes with a lobster clasp, so the heart rests neatly where you place it. Wear it with a crisp white shirt or a soft knit sweater for an easy, put-together look. It makes a thoughtful gift for someone who loves April's birthstone.
Key Features
- Crafted in 14K yellow gold with a polished finish
- Set with lab-grown diamond
- Cable necklace design
- Measures 23.94 mm wide and 18 inches long
- Secured by a lobster clasp
- Approximate weight of 3.37 grams
Why You’ll Love It
- An open heart shape that feels romantic without being fussy.
- Bright lab-grown diamonds add sparkle to everyday outfits.
- Warm yellow gold tone flatters casual and dressy looks alike.
- Easy to layer or wear on its own.
Perfect For
Ideal for birthdays, anniversaries and Valentine's Day, or as a treat for yourself. A fitting gift for a wife, daughter, mother or friend with an April birthday.
Precious Metals at Sophia Jewelers
Every piece is crafted from certified precious metals selected for lasting brilliance and skin-safe wear.
14k Gold (Most Popular)
58.3% pure gold. The ideal balance of durability and color richness. Available in yellow gold, white gold, and rose gold. The standard choice for fine jewelry and everyday wear.
18k Gold (Premium)
75% pure gold. Richer in color, slightly softer than 14k. Preferred for statement and heirloom pieces where purity matters most.
10k Gold (Everyday Value)
41.7% pure gold. The most durable gold alloy — ideal for active wearers. Stamped 417 on the piece.
Sterling Silver
92.5% pure silver, stamped 925. Cool-toned and versatile. Best for occasional wear; silver develops a natural patina over time.
Platinum
Naturally white, hypoallergenic, and the most durable precious metal. Recommended for those with nickel sensitivities.
Titanium & Stainless Steel
Lightweight, hypoallergenic, and virtually maintenance-free. Excellent for everyday jewelry and sensitive skin.
Lab-Grown Diamonds
Lab-grown diamonds are physically, chemically, and optically identical to mined diamonds. Same carbon crystal structure, same hardness (10 on the Mohs scale), same brilliance. The difference is origin and price: created in a controlled environment, lab-grown diamonds are typically 50-70% less expensive than comparable mined stones, meaning you get a larger, higher-quality diamond for your budget.
All Sophia Jewelers lab-grown diamonds are conflict-free by definition and independently graded by IGI or GIA using the same 4C criteria applied to mined diamonds: cut, color, clarity, and carat weight.
How to Care for Your Jewelry
Fine jewelry deserves thoughtful care. These guidelines will keep your pieces looking luminous for years.
Daily Wear
- Remove jewelry before swimming, showering, or using cleaning products
- Apply lotion, perfume, and hairspray before putting on your jewelry — chemicals can dull metal and damage stones
- Avoid wearing jewelry during gym workouts or high-contact activities
- Put jewelry on last when getting dressed — last on, first off
Cleaning at Home
Mix a few drops of mild dish soap with warm water. Soak for 15-20 minutes, then gently scrub with a soft toothbrush. Rinse thoroughly and dry with a lint-free cloth. This method is safe for gold, platinum, and most gemstones. Avoid ultrasonic cleaners for pearls, opals, and emeralds.
Storage
Store each piece separately in a soft pouch or compartmentalized jewelry box to prevent scratching. Keep chains flat or hung to avoid tangling. Store silver in anti-tarnish pouches to slow oxidation.
Professional Care
Have precious stone jewelry professionally cleaned and inspected once a year to check prong integrity, stone security, and clasp function. Most jewelers offer this service free of charge.
Shipping
Free standard shipping on all orders over $99. Orders ship within 2–3 business days in insured packaging.
- Standard Shipping: Free on orders over $99 (5-7 business days)
- Expedited Shipping: 2-3 business days (additional fee at checkout)
- Overnight Shipping: Next business day (available for select items)
A tracking number is emailed as soon as your order ships.
Returns and Exchanges
We offer a 30-day return policy on all unworn, unaltered items in original condition with original packaging. Custom-engraved and custom-sized items are not eligible for return.
To begin a return or exchange, email info@sophiajewelers.com with your order number. Our team responds within one business day.
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Hearts & Love Necklaces, answered
Straight answers about hearts & love necklaces. See all Hearts & Love Necklaces
- Free Shipping
- Orders Over $99
- Exchanges
- 30 Days
What affects the price of heart necklaces?
Metal, stone type, and carat weight drive the price. 14K gold costs more than sterling silver or gold-plated silver, and diamond or lab-grown diamond pieces differ from cubic zirconia ones. Chain length and the size of the heart matter too. Use the Price filter on this page to set a budget.
Which heart necklace styles are most popular?
Heart toggle chains and cubic zirconia hearts lead the list. Stainless steel toggle necklaces, a red crystal heart, and micro-pavé sterling silver hearts come first. Lab-grown diamond open heart and multi-heart necklaces in 14K gold follow closely behind.
Which metal is best for an everyday heart necklace?
14K gold, sterling silver, or stainless steel suit daily wear. 14K gold is solid and holds up well, while stainless steel is a sturdy, budget-friendly choice. Gold-plated pieces look rich but are best kept away from water and perfume to protect the finish.
What is the difference between lab-grown diamond and cubic zirconia hearts?
Lab-grown diamond is a real diamond; cubic zirconia is a different gem. Lab-grown diamonds are made in a lab and set in 14K gold here, with sparkle at a higher price. Cubic zirconia gives a bright look in sterling silver at a gentler price.
How do I choose a heart necklace length?
An 18 inch chain is the most common choice. It sits just below the collarbone. A 16 inch chain rests higher and shows off a smaller heart, while a 22 inch chain hangs longer and layers well. Some styles include an extender for adjusting.
How should I care for a heart necklace?
Wipe it gently after wearing and store it separately. Keep it dry in a soft pouch so chains do not tangle. Pavé and gemstone hearts should avoid harsh cleaners. See our jewelry care guide for more.