RUCHI Kunzite with Diamond Accent Yellow Gold Pendant Necklace
By Ruchi New York
Located in New York, NY
18K Yellow Gold Kunzite: 12.48 Cts
Diamond, Kunzite, Gold, 18k Gold, Yellow Gold
GIA Certified 1.00 Carat Natural Fancy Vivid Orange Yellow Diamond Ring
Located in Tokyo, JP
A beautiful ring featuring a GIA Certified 1.00 Carat Natural Fancy Vivid Orange Yellow Diamond and 0.64 Carat Diamond accents set in Platinum. Diamonds have been adorned and cherish...
Yellow Diamond, Platinum
Natural Diamond 14k Gold Heart Pendant Evil Eye Blue Sapphire Fine Jewelry
Located in Jaipur, IN
Evil Eye Charm Blue Sapphire Gemstone Pave Diamond Heart 14k Yellow Gold Heart Pendant Jewelry Details:- Item Code:- PEMJ-1927 Material - 14K Solid Yellow Gold Diamond Weight - 0.2...
Diamond, White Diamond, Blue Sapphire, 14k Gold, Yellow Gold
Gold, White Gold, and Diamond Heart Charm
Located in Princeton, NJ
A very cute and highly fashionable 18 karat yellow and white gold solid heart charm, embellished with three diamond set star motifs and open in the center with a diamond border surro...
Diamond, Gold, 18k Gold, White Gold
$33,209 / item
Multi Cut Diamond 18K White Gold Heart Stud Earrings
Located in Los Angeles, CA
Elevate your elegance with these stunning Multi Cut Diamond 18K White Gold Heart Stud Earrings, showcasing round brilliant-cut diamonds that exude timeless beauty. Perfect for any oc...
Diamond, Gold, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum
John Hardy Heart Ring 18 Karat Gold Rubber Vintage Estate
By John Hardy
Located in New York, NY
This is a wonderful signed John Hardy Heart Ring with an 18 Karat Yellow Gold Heart on a Black Rubber band.
Gold, Yellow Gold, 18k Gold
Natural 50.22 Carat SI/H Mixed Diamond Necklace 18 Karat Yellow Gold Jewelry
By Spectrum Jewels
Located in Diera, Dubai
Details Item Code :- SECK-9794 Gross Wt. :- 61.54 gm 18k Yellow Gold Wt. :- 51.49 gm Natural Diamond Wt. :- 50.22 Ct. ( AVERAGE DIAMOND CLARITY SI1-SI2 & COLOUR H-I ) Choker Leng...
Diamond, 18k Gold, Yellow Gold
Kieselstein Cord 18k Gold Diamond Chain with Detachable Diamond Heart Pendant
By KIESELSTEIN-CORD
Located in Weston, MA
This artful chain is accented with 27 baguette-cut VS quality diamonds. It measures a wearable 16 inches in length and has a hidden bale that attaches to the bombe diamond encrusted ...
Diamond, 18k Gold, Yellow Gold
Van Cleef & Arpels Sweet Alhambra Heart Mother of Pearl Diamond Gold Earrings
By Van Cleef & Arpels
Located in Tysons, VA
Description: An elegant pair of Sweet Alhambra Heart earrings by Van Cleef & Arpels, beautifully crafted in solid 18K yellow gold.
Pearl, Diamond, 18k Gold, Yellow Gold, Gold
Tiffany & Co. Heart Padlock and Key Sterling Silver 18K Gold Pendant Necklace 19
By Tiffany & Co.
Located in University Place, WA
The puffed heart padlock is crafted in sterling silver with a working keyhole detail at its center, while the petite key is rendered in warm 18k yellow gold, creating a beautiful two...
18k Gold, Yellow Gold, Sterling Silver
Vintage 18k pendant - Holy Sacred Heart of Jesus - our lady of Scapular
Located in Antwerp, BE
For sale is this lovely 18 karat yellow gold double sided medal with marvellous details.
Gold, 18k Gold, Yellow Gold
Modern Tourmaline Cultured Pearl 18 Karat Yellow Gold Pendant
Located in Poitiers, FR
Pendant in 18 karat yellow gold. Delightful yellow gold pendant, featuring a gold link forming a loop and allowing a chain to be passed through it.
Pearl, Cultured Pearl, Tourmaline, Gold, 18k Gold, Yellow Gold
Vintage 18k pendant - Holy Sacred Heart of Jesus - our lady of Scapular
Located in Antwerp, BE
For sale is this lovely 18 karat solid yellow gold double sided medal with marvellous details.
Gold, 18k Gold, Yellow Gold
1990s 18k Gold Designer 2 Carat Pavé Diamond Heart Link Bracelet
Located in Santa Barbara, CA
Crave the feel of lush Italian 18k yellow gold wearing this pavé diamond heart link bracelet.
Diamond, Gold, 18k Gold, Yellow Gold
$32,200Sale Price|20% Off
Alexander Beverly Hills 11.55ct Columbian Emerald & Yellow DIamond Earrings 18k
By Alexander Beverly Hills
Located in BEVERLY HILLS, CA
Stunning Columbian emerald and natural yellow diamond earrings, emeralds of an electric color, GIA certified. High jewelry by Alexander Beverly Hills. 11.95 carats total gemstone wei...
Diamond, Emerald, Yellow Diamond, Gold, 18k Gold, Yellow Gold
Emerald Sapphire Ruby Diamond Yellow Gold 18K Ring
Located in Geneva, CH
Emerald, Sapphire, Ruby and Diamond fancy cuts on Yellow Gold 18K Ring Unreadable hallmark. Circa 1960. Top pattern dimensions: 20.74 mm. x 12.70 mm. x 6.40 mm. Gross weight: 9.16 gr...
Diamond, Emerald, Ruby, Sapphire, 18k Gold, Yellow Gold
Tiffany & Co. Pearl Ruby Diamond Gold Domed Heart Brooch
By Tiffany & Co.
Located in Stamford, CT
1950's Authentic Tiffany + Co, Ruby, diamond and Akoya pearls set in 18k yellow gold, Italian made domed heart shaped brooch. 1 round diamond approx. weight .07cts. 11 round rubi...
Diamond, Natural Pearl, Ruby, Pearl, 18k Gold, Gold, Yellow Gold
.75 Carat Natural Ruby Diamonds Dangle Heart Necklace 18 Karat
Located in New York, NY
G color Vs-2 clarity 18Kt yellow gold / 6 grams. Heart Overall: .61 X .59 inch Necklace Overall length: 17 Inch Comfortable and secure clasp
Diamond, Ruby, 18k Gold, Yellow Gold
1.29 CTW Round Brilliant Diamond Heart Ring in 18k Two Tone Gold
Located in Houston, TX
1.29 CTW Round Brilliant Diamond Heart Ring in 18k Two Tone Gold A romantic yet sophisticated diamond heart ring crafted in luxurious 18K white and yellow gold.
Diamond, 18k Gold, White Gold, Yellow Gold
GIA Orange Sapphire & White Diamond Toi Et Moi Ring in 18K Yellow Gold & Rhodium
Located in Los Angeles, CA
Gorgeous toi et moi ring with a 7.17 ct. GIA orange sapphire heart and 1.28 ct. GIA D SI1 white diamond heart.
White Diamond, Sapphire, Yellow Gold
Estate Angela Cummings 18K Gold and Diamond Heart Earrings - VHK#983
By Angela Cummings
Located in Hicksville, NY
Estate Angela Cummings 18K Gold and Diamond Heart Earrings - VHK#983 Item Details: Year: 1984 (Signed on the earring) Metal Type: 18K Yellow Gold [Hallmarked, and Tested] Weight: 20...
Diamond, Gold, 18k Gold, Yellow Gold
Tiffany & Co. Paloma Picasso Loving Hearts Link Bracelet Sterling 925 Gold 18k
By Tiffany & Co.
Located in Greensboro, NC
Designer: Paloma Picasso Design: Loving Hearts Metal Content: Sterling Silver & 18k Yellow Gold Bracelet Style: Link Fastening Type: Tab Box Clasp with One Side Safety Clasp T...
Gold, 18k Gold, Yellow Gold, Sterling Silver
18k Solid Gold 6.45ctw Invisible Set Sapphire Diamond Heart Omega Earrings
Located in Montclair, NJ
--Stone(s):-- (52) Natural Genuine Sapphires - Calibre Cut - Invisible mystery Set - Deep Blue Color - 6ctw (approx.) (46) Natural Genuine Diamonds - Round Brilliant Cut - Pave Set -...
Diamond, Sapphire, Gold, 18k Gold, White Gold, Yellow Gold
14k Yellow Gold Swiss Blue Topaz Flower Form Ring
Located in Fairfield, CT
14k yellow gold ring. This cheerful ring has a cluster of heart shaped faceted, Swiss blue color blue topaz, set into a flower form, approximately 2.25 TCW, prong set, and decorated ...
Topaz, Blue Topaz, 14k Gold, Yellow Gold
Open Heart Natural Diamond Pendant in 14K Solid Gold (Certified)
Located in New Delhi, DL
★WHY US?★ -A timeless heart silhouette, symbolizing love, care, and connection.
Diamond, Gold, 14k Gold, Rose Gold, White Gold, Yellow Gold
Tiffany & Co. Paloma Picasso 1980's 18K Gold Vintage Loving Hearts Bracelet
By Paloma Picasso
Located in Philadelphia, PA
Designed as a fancy link chain comprised of ribbon-like pierced heart links Grooved with detail and featuring a high polish finish Completed by concealed clasp closure With hinged fi...
Gold, 18k Gold, Yellow Gold
14 Karat Real Gold Heart Charm Necklace with Paper Clip Chain
By Gad & Co.
Located in Miami, FL
14-karat real, solid gold heart charm pendant mounted in a semi-hollow 14-karat gold paper clip chain. The chain closure lies at the heart, a symbolic and metaphoric design that open...
14k Gold, Gold, Yellow Gold
Sunita Nahata Lemon Quartz 10.43ct. Drop Earrings in 18Karat Yellow Gold.
By Sunita Nahata
Located in Hong Kong, HK
Elegant and romantic, these earrings feature heart-shaped lemon quartz cabochons, bezel-set in warm 18K yellow gold.
Quartz, Gold, 18k Gold, Yellow Gold
Sunita Nahata Smokey Quartz 10.55ct. Drop Earrings in 18Karat Yellow Gold.
By Sunita Nahata
Located in Hong Kong, HK
Elegant and romantic, these earrings feature heart-shaped smoky quartz cabochons, bezel-set in warm 18K yellow gold.
Quartz, Gold, 18k Gold, Yellow Gold
0.31 Ct Diamond Heart Cluster Studs — 14K Two-Tone Gold Princess-Cut Earrings
Located in Jaipur, IN
Heart-shaped diamond cluster stud earrings in a distinctive two-tone construction — a bold yellow gold outer heart silhouette frames a white gold inner bezel entirely filled with pri...
Diamond, 14k Gold, Yellow Gold
FRED Paris Earrings in 18 Carat Yellow Gold and Amethyst vintage
By Fred Paris
Located in Paris, FR
FRED Earrings in gadrooned 18-carat yellow gold setting two large heart-shaped amethysts in a bezel setting.
Amethyst, 18k Gold, Yellow Gold
Victorian 0.35ct Sapphire and Ruby Double Heart Ring, c.1880s
Located in London, GB
This enchanting Victorian double heart crowned ring features a romantic design of two entwined hearts with two beautiful gemstones at their centres, a 0.35 carat ruby and a 0.35 cara...
Diamond, Ruby, Sapphire, 18k Gold, Yellow Gold, Silver
Beaded Heart Necklace Stack, 14K Gold, MADE TO ORDER, NK6561
By Gabriel & Co.
Located in Austin, TX
This gorgeous petite 14k yellow gold open heart pendant is sure to put a smile on anyone's face!
14k Gold, Yellow Gold, Rose Gold, White Gold
Rare Vintage Van Cleef & Arpels Round Diamond Heart Shape Earring Studs
By Van Cleef & Arpels
Located in Birmingham, GB
Rare Vintage Van Cleef & Arpels Natural Diamond 18k Yellow Gold Heart Shape Earrings. A fine vintage pair of earrings with the heart shape motifs typical of Van Cleef & Arpels, set ...
Diamond, White Diamond, Gold, 18k Gold, Yellow Gold
$800Sale Price|20% Off
14k Solid Gold Dainty Heart Stacking Statement Ring Minimalist Valentines Ring.
Located in Chicago, IL
14k Solid Gold Dainty Heart Stacking Statement Ring Minimalist Valentines Ring.
Gold, 14k Gold, Yellow Gold
Konstantino Ruby Heart Scrollwork Drop Earrings 925 18k Round .30ctw Pierced
By Konstantino
Located in Greensboro, NC
Brand: Konstantino Metal Content: Sterling Silver & 18k Yellow Gold Stone Information Natural Ruby Treatment: Heating Carat(s): .30ctw Cut: Round Total Carats: .30ctw Style: Dro...
Ruby, 18k Gold, Yellow Gold, Sterling Silver
Vintage Victorian Carved Shell Lady Cameo Ring in 18 Karat Yellow Gold Size 7
Located in New York, NY
A gorgeous pink carved lady in yellow gold vintage cameo ring featuring a shell carved Victorian inspired lady cameo figurine set on a raised bezel leading to pinched shoulders . The...
Amethyst, 18k Gold, Yellow Gold
Heart Charm Pendant Necklace with Genuine Diamond in 14k Solid Gold
Located in Chicago, IL
Tilted Heart Necklace 14k Solid Gold Genuine Diamond Heart Charm For Girlfriend Light weight can be worn everyday Additional information: Condition: New with tags: A brand-new, unus...
Diamond, Yellow Gold, 14k Gold
Paloma Picasso Tiffany & Co. 1990's 18K Gold Vintage Loving Heart Earrings
By Paloma Picasso for Tiffany & Co.
Located in Philadelphia, PA
Deigned as pierced ribbon style hearts with crossed tails Graphic graffiti style with grooved detail With high polish gold finish throughout Completed by posts with hinged omega back...
Gold, 18k Gold, Yellow Gold
Diamond Slide Pendant Necklace Mom Heart .25ct Two Tone Gold
Located in Dearborn, MI
Diamond Slide Pendant Necklace Mom Heart .25ct Two Tone Gold Beautiful Mom Heart Diamond Pendant 10K Two Tone Gold 100% Natural Diamonds .25 Carat Diamond Weight Classic Desi...
Diamond, Gold, 10k Gold, White Gold, Yellow Gold
$848Sale Price / item|20% Off
18k Gold Heart Charm Diamond Necklace Minimalist Dainty Charm Necklace
By Oshi Jewels
Located in Bangkok, TH
Delicate Minimal Heart Charm Diamond Necklace is made of 18k solid gold.
Diamond, 18k Gold, Rose Gold, White Gold, Yellow Gold
$941Sale Price|20% Off
Dainty Diamond Heart Shape Engagement Couples Ring in 14k Solid Gold
Located in Chicago, IL
Total Carat Weight: 0.24 & Under Country/Region of Manufacture: India Style: Band Base Metal: Yellow Gold, 14k Clarity: Vs-Si Secondary Stone: Diamond Ring Shape: Heart Main Stone Tr...
Diamond, Yellow Gold, Gold, 14k Gold
Golden Sunrise 14K (or 18k upon request) Pave Diamond Heart Ring
Located in Los Angeles, CA
Crafted in 14K yellow gold, it showcases a beautifully cut heart-shaped diamond weighing 0.15 carats, adding a soft yet brilliant sparkle to the piece.
14k Gold, Rose Gold, White Gold, Yellow Gold, Platinum
Early Victorian 14K Gold Padlock Garnet Heart Clasp Rolo Link Bracelet
Located in Venice, CA
Circa the 1840’s, the centerpiece of this 14k gold bracelet is a heart shape padlock clasp with a garnet carbuncle. The oval cabochon has a high profile and blood red glow—the gold b...
Garnet, 14k Gold, Yellow Gold
18k Gold 'Golden Sky Cuff' Scattered Diamonds with Heart Clasp Accent & Hinge
By Nancy Phillips
Located in Eugene, OR
One of our favorite bracelets from the Golden Sky Collection by Nancy Phillips. It features a bombé (domed), thick profile with a smooth, brushed finish rather than a high-polish, ...
Diamond, Yellow Gold, 18k Gold, Gold
Antique Crescent and Heart pendant necklace, Sapphire, Diamond and Pearl
Located in NEWARK, GB
This antique Crescent moon and Heart pendant necklace is simply beautiful! Such a romantic and elegant piece, it is crafted from sterling silver on 9ct gold and is designed as an op...
Diamond, Pearl, Sapphire, 9k Gold, Yellow Gold, Sterling Silver
14k Yellow Gold Black Onyx & Peridot 36" By The Yard Station Chain Necklace
Located in Montclair, NJ
--Stone(s):-- (12) Natural Genuine Black Onyx - Round, Rectangular & Heart Cut - Bezel Set - Black Color (12) Natural Genuine Peridot - Oval, Pear & Amethyst Cut - Bezel Set - Lime ...
Onyx, Peridot, Gold, 14k Gold, Yellow Gold
Heart Sapphire Natural Diamond Station Bracelet in 14K Solid Gold (Certified)
Located in New Delhi, DL
★ MATERIALS ★ Stone: Natural Sapphire Shape: Heart Carat: 4.06 ct Color: Blue Stone: Natural Diamond Shape: Round Carat: 1.53 ct Color: FGH Clarity: SI ★ THE METAL ★ 14K Soli...
Diamond, Sapphire, Blue Sapphire, Gold, 14k Gold, Rose Gold, White Gold,...
Chopard 'Happy Diamonds' Heart Shaped Floating Diamond Stud Earrings 18K Gold
By Chopard
Located in Scottsdale, AZ
Crafted in 18 karat yellow gold, each earring features three floating diamonds encased within a transparent heart frame, allowing the stones to shimmer freely with every movement.
Diamond, Gold, 18k Gold, Yellow Gold
$3,120Sale Price|20% Off
Antique Heart shaped Amethyst Brooch with Diamond, Edwardian, circa 1910
Located in Aspen, CO
Antique heart shaped, buff-topped natural amethysts are suspended from a platinum and rose cut diamond garland.
Amethyst, White Diamond, Diamond, Gold, 18k Gold, Yellow Gold, Platinum
GIA Certified 1.00 Carat Fancy Yellow VS2 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 3435001427 Shape And Cut: Heart Carat Weight: 1.00 carat Measurements: 5.68 x 6.70 x 3.32 mm Color Grade: Fancy Yellow FEATURES OF THE DIAMOND: Thi...
Diamond
Antique Victorian Tiger's Eye Heart Pendant with Seed Pearl Halo, 14 Karat
Located in AMSTERDAM, NL
Crafted from 14 karat gold, this pendant features a heart-shaped tiger's eye surrounded by a halo of delicate seed pearls.
Pearl, Tiger's Eye, Gold, 14k Gold, Yellow Gold
$1,224Sale Price|20% Off
Vintage 14K Yellow Gold Blue Topaz Flower Earrings with Diamonds
Located in Hong Kong, HK
Dive into serene sophistication with our 14K yellow gold blue topaz flower earrings, a tranquil bloom showcasing 7.52 carats of pear-shaped blue topaz gems in vivid azure shades, evo...
Diamond, Blue Topaz, 14k Gold, Yellow Gold
Victorian 2 CT Rose Diamond Enamel Heart Pendant Necklace Brooch 14K Gold
Located in New York, NY
The heart is silver atop 14 Karat Yellow Gold. The listing is only for the pendant.
Diamond, Gold, Yellow Gold, Silver, 14k Gold, Enamel
Couture Chanel Rousselet Hearts Camellia Metallic Glass Bracelet & Sautoir 1920s
By Chanel
Located in Chicago, IL
In addition to the topaz-color glass hearts in the amusing necklace, its copper-color filigree hearts depict camellias like the carved-galalith button fastener of the bracelet.
Gold-filled, Yellow Gold, Silver, Brass, Copper
TJD 0.15 Carat Round & Baguette Cut Diamond 18KT Gold Tilted Heart Pendant
By TJD
Located in New York, NY
A bright and beautiful symbol of the love you share, this heart pendant is certain to delight. These heart pendant are studded with 23 round and Baguette natural diamonds in prong se...
White Diamond, Gold, 18k Gold, Yellow Gold
TJD 0.15 Carat Round & Baguette Cut Diamond 14KT Gold Tilted Heart Pendant
By TJD
Located in New York, NY
A bright and beautiful symbol of the love you share, this heart pendant is certain to delight. These heart pendant are studded with 23 round and Baguette cut natural diamonds in pron...
White Diamond, Gold, 14k Gold, Yellow Gold
Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself.
Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.
Since its founding, in 1837, Tiffany & Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.
For the woman who prefers a minimalist look, the Tiffany & Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.
Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.
In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so.
Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.
Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle.
BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.
A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in.
Since Van Cleef & Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.
Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.
Find a stunning collection of vintage and antique gold jewelry on 1stDibs.