September is Sapphire Season
There's a reason sapphires have remained one of the world's most beloved gemstones. Their colors can be rich and dramatic, soft and luminous, unexpected, and entirely unique. With a hardness of 9 on the Mohs scale, sapphires are exceptionally durable, making them a beautiful alternative to the classic diamond engagement ring—and an equally beautiful choice for everyday wear.
This September, we're celebrating our love of sapphires with 10% off all in-stock sapphire jewelry throughout the month.
Whether you're celebrating a September birthday, looking for a meaningful gift, or simply drawn to the beauty of sapphires, it's a wonderful time to discover a piece of your own.
September 1st–30th
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RINGS
Browse our collection of sapphire necklaces.
This ring is a celebration of jewel tones, centered on a 2.51‑carat natural teal sapphire. The asscher-cut’s distinctive faceting creates a “hall of mirrors” effect that bathes the stone in shifting blue‑green flashes—revealing new depth and nuance as light and angle change. Flanking the sapphire are perfectly matched trapezoid and tapered‑baguette diamonds, totaling 0.67 carats, which add crisp brilliance without competing with the sapphire’s color.
The diamonds and sapphire are set in platinum to form a seamless, luminous head, while the band is crafted in warm 18k yellow gold to enhance the sapphire’s striking teal. The result is a timeless silhouette with a modern edge—equally stunning as a bold cocktail ring or a one‑of‑a‑kind engagement ring for someone who loves color and refined design.
Reference # 232S3879
An amazing 7.78-carat star sapphire is the "star" of this very special ring. Six oval sapphires (1.15 carats) and six diamonds (1.14 carats) circle the center stone. Set in platinum. A one-of-a-kind ring!
You can own the original, award-winning piece!
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This extraordinary ring showcases a 4.00 carat square-cut ocean-blue sapphire at its center. The sapphire’s natural teal-blue hue is rare and highly prized, typically found among the finest material from Madagascar and Sri Lanka. On each side of the sapphire are two round brilliant-cut diamonds and one pear-shaped diamond, combining for a total diamond weight of 1.27 carats. The entire composition is set in lustrous platinum, which beautifully enhances the sapphire’s cool, oceanic tones. Handcrafted and one-of-a-kind, this ring is a wearable work of art—perfect for anniversaries, milestone celebrations, or any moment when you want to elevate your elegance and sparkle.
Reference #232S3868
A classic design to be worn every day. High-grade, beautiful sapphire with a GIA certificate stating that the gemstone is genuine and sourced from Madagascar. High-grade diamonds surround this stunning sapphire.
Vintage TFCo.
This exquisite vintage T. Foster & Co. star sapphire and diamond ring showcases timeless elegance and masterful craftsmanship. The centerpiece is a stunning star sapphire, approximately 6 carats, exhibiting the rare and captivating star-like phenomenon known as asterism.
Surrounding the sapphire are 112 round brilliant-cut diamonds, collectively totaling 1.36 carats, adding brilliant sparkle and enhancing the overall beauty of the piece.
Perfect for collectors and connoisseurs of fine jewelry, this ring represents a harmonious blend of vintage charm and luxurious design.
Resizing is not included in the price.
Reference # 232S3727
This platinum ring showcases a 2.52-carat deep blue cushion-cut Madagascar sapphire, flanked by a pair of trillion-cut sapphires and accented with 12 round diamonds totaling 0.80 carats. GIA Certificate included.
This stunning sapphire and diamond ring features a beautiful pattern of alternating round brilliant-cut diamonds and vibrant emeralds. Its elegant design allows it to shine beautifully on its own, making it a perfect statement piece. Alternatively, it pairs wonderfully with our collection of “stackable” bands, offering endless possibilities to mix and match for a personalized, layered look. Whether worn solo or stacked, this ring adds a touch of timeless elegance to any jewelry ensemble.
Reference # 232S3790
This stunning ring showcases a 2.05‑carat natural teal sapphire, masterfully faceted in a modified asscher cut to intensify its deep, shifting teal tones that subtly change as the light moves. The center stone is beautifully framed by ten round brilliant‑cut diamonds and two pear‑shaped diamonds, totaling 0.81 carats of sparkling accent stones. Set in an elegant silhouette on an 18K yellow gold band, the design balances modern sophistication with timeless warmth—perfect as a distinctive engagement ring or an eye‑catching right‑hand piece.
Reference #232S3871
Our signature platinum pavé crossover design sapphire ring is ablaze with diamonds, underneath, over, and all around! A magnificent, large 3.59-carat oval sapphire, the bluest of blues, floats amid a sea of sparkling white brilliance. This eye-catching ring will draw compliments from all. A must-see ring that you will love and wear every day. It features 103 round brilliant-cut diamonds totaling 1.44 carats. The ring measures 0.625" from X to X and is almost 0.5" from top to bottom, sitting 0.625" off the finger.
This diamond and sapphire ring embodies timeless elegance, making it an essential addition to any fine jewelry collection. The delicate silhouette highlights the vibrant blue sapphires, whose rich hue is beautifully complemented by the dazzling natural diamonds.
Crafted in 18k yellow gold, the ring offers a warm, luxurious glow that enhances its classic style and effortless beauty. Ideal for everyday wear or special occasions, this piece exemplifies our commitment to expert craftsmanship and lasting quality.
Reference # 232S3725
An elegant and timeless design, this diamond-studded split shank halo ring features a 2.05-carat unheated Ceylon sapphire, renowned for its rarity and beauty. Surrounded by 52 round brilliant-cut diamonds totaling 0.75 carats, the design is crafted in 18K gold with handmade prongs and scoop-set diamonds. Bold yet refined, this piece exudes sophistication and can be customized to fit any center stone.
The center of this “flower” is a 2.01 carat round deep blue Sapphire with 1.85 carats of round brilliant cut diamonds, F color, SI1 clarity. Set in platinum. A true stunner!
This lovely estate ring showcases a striking, classic oval blue sapphire of approximately 2.0 carats, its rich, natural color and excellent clarity making it a beautiful centerpiece. A halo of 12 round-brilliant-cut diamonds surround the sapphire, adding sparkle and a refined contrast to the deep blue. The stones are set on an 18k yellow gold split shank, whose warm tone and elegant lines enhance the vintage-inspired silhouette.
Romantic and timeless, this ring makes a sophisticated alternative to a traditional diamond engagement ring or a stunning right-hand piece for anyone who loves sapphire blue. Ideal for someone seeking classic elegance with distinctive color and quality.
Reference # 232S3894
Set in platinum, this stunning design showcases a 3.34-carat sapphire, surrounded by 10 round brilliant-cut diamonds totaling 1.63 carats. With its brilliant sparkle and luxurious allure, this piece is truly remarkable.
EARRINGS
Browse our collection of sapphire earrings.
These breathtaking 18k yellow gold sapphire and diamond earrings, featuring 28 radiant round brilliant cut diamonds totaling 1.97 carats. The diamonds are expertly set alongside two stunning Ceylon sapphires, showcasing a vibrant cornflower blue color.
The earrings' sleek and sophisticated design makes them perfect for everyday wear or special occasions. The 18k yellow gold setting provides a warm and inviting backdrop for the icy sparkle of the diamonds and the rich blue hue of the sapphires.
Part of the TRANQUILITY design options, this pair of striking earrings are set in 18K white gold with post backs. 8 deep blue sapphires (.27 carats), are centered by 2 1.4mm (.02 carats) round brilliant cut diamonds. The scoop-set section at the top of each earring has 24 (.12 carats) diamonds.
T. Foster & Co. design #233S3177
Our breathtaking New Sapphire and Diamond Drop Earrings, a captivating fusion of sophistication and timeless beauty. Crafted to perfection, these exquisite earrings exude luxury, making them a stunning addition to any jewelry collection. At the heart of these mesmerizing earrings are round-cut sapphires, totaling a lavish carat weight of 0.83. Surrounding these precious sapphires are dazzling round-cut diamonds with a combined carat weight of 0.66. The lustrous platinum setting adds a touch of opulence, elevating the overall allure of the design. Embrace luxury and grace with this exquisite pair, destined to become a cherished heirloom for generations to come.
Reference # 233S3592A
One of the Together styles available, these earrings are 18K white gold set with 8 deep blue sapphires (.35 carats), and 4 diamonds (.06 carats). They dangle gracefully from a hook back.
T. Foster & Co. design #233S3202
Vintage TFCo.
With 2.23 carats of shimmering diamonds and 1.50 carats of irresistible blue sapphires, these earrings are a bold, yet delicate statement. Perfectly proportioned for you special occasions and events.
T. F Vintage
reference# 233S3456
NECKLACES
Browse our collection of sapphire necklaces.
Vintage TFco.
Vintage TFco. Platinum Set Sapphire & Diamond Pendant with Platinum Snake Chain. This exquisite piece features a dazzling 2.48-carat blue sapphire as the center stone, complemented by a striking halo of round brilliant-cut diamonds totaling 1.97 carats.
Expertly hand-set in platinum, the pendant showcases timeless craftsmanship and elegance. The pendant is suspended on an 18-inch platinum snake chain, completing this classic vintage design perfect for special occasions or everyday luxury.
Reference # 234S3704
A 2.97 carat deep blue oval sapphire is circled in diamonds with a diamond bezel (1.2 carats total diamonds). Set in 18K White Gold.
GIA Lab Certificate, staying natural Sapphire origin Sri Lanka
Reference #234S2953
Part of the Together design options, this lovely pendant features 4-2mm sapphires for a total of .18 carats and 2 round diamonds, set in 18K white gold. Chain sold separately.
T. Foster & Co. design #234S3212
This beautiful pendant is centered by a 2.07 carat, deep indigo blue sapphire. 13 round brilliant cut diamonds circle the sapphire and are used in the bail for a total of 1.19 carats in diamonds. Crafted in 18K white gold. Chain sold separately.
Reference #234S3153
A superior Blue Heart Shaped sapphire and diamond necklace with a stunning 4.31 carat royal blue sapphire surrounded by round and princess cut diamonds. In lustrous 18 karat yellow gold, this bold and beautiful pendant is perfect for day or evening wear.
With attached yellow gold chain.
Specifications:
GIA certified 4.31 carat natural blue sapphire sourced from Sri Lanka. Certificate #2185642769 H
12 Round and princes cut diamonds total 1.28 carats, F color, VS clarity
T F Co. Original Design #C17610
T. Foster & Co. Reference # 23553451
