Colombian emerald and diamond necklace that sold for sold for $541,800PhillipsA platinum necklace set with 20 graduated step-cut Colombian emeralds separated by rows of brilliant-cut diamonds sold for $541,800, making it the top lot at Phillips' New York Jewels auction on June 10.The sale of 113 lots totaled more than $4.1 million. Phillips reported that 95% of lots sold, with 82% of sold lots achieving prices within or above their estimates.Signed jewels by Harry Winston, Cartier, JAR and other prestigious houses achieved a 100% sell-through rate by lot and doubled their combined pre-sale estimate.Only seven lots went unsold, including the auction's projected top lot: a platinum and 18-karat yellow gold ring centered on a 31.77-carat oval paraiba tourmaline from Mozambique, accented by rows of marquise-cut diamonds, circular-cut blue tourmalines and brilliant-cut diamonds. The ring carried an estimate of $550,000 to $650,000.It was one of five paraiba tourmalines offered in the sale—four from Mozambique and one from Brazil. The remaining four all found buyers, with two ranking among the auction's 10 highest-selling lots.Paraíba tourmaline was first discovered in 1989 in Brazil’s Paraíba state, from which it takes its name. The gemstone's distinctive electric blue-to-green color is caused by the presence of copper. The original Brazilian deposits were largely depleted by the mid-1990s, though copper-bearing tourmalines with similar color and mineral composition were later discovered in Nigeria, Mozambique and Ethiopia. These stones are often marketed as ‘paraiba’ tourmalines, typically without the capitalization or accent. The rarest and most valuable examples remain those mined in Paraíba, Brazil, which today are found primarily in museums and private collections.MORE FOR YOUImportant private collections from Tina Hills and Irma Nicolas also achieved exceptional results. Forty of the 41 lots from the Hills collection sold, while all 13 lots from the Nicolas collection found buyers.“Phillips has continuously demonstrated a proven ability to achieve strong results for single-owner collections,” said Dianne Batista, Phillips’ head of jewels, New York and senior vice president, and Cristina Rodrigo, specialist and head of sale, in a joint statement. “Both of these highly esteemed collections doubled their pre-sale estimates, further reinforcing the strength of the market and the continued confidence in jewels from private collections.”The remaining top 10 lots were as follows:14.71-carat fancy intense yellow diamond ring that sold for $258,000PhillipsThe second highest-selling lot was a platinum ring centered on a 14.71-carat fancy intense yellow diamond flanked by two triangular-cut diamonds from the Nicolas collection. It sold for $258,000, exceeding its estimate.Paraiba tourmaline and diamond pendant necklace fetched $167,700PhillipsA white gold pendant necklace featuring a 5.86-carat pear-shaped Brazilian paraiba tourmaline surrounded by brilliant-cut diamonds sold for $167,700, below estimate.A platinum ring centered with a 7.30-carat diamond sold for $154,800PhillipsA platinum ring centered on a 7.30-carat step-cut diamond graded F color and VS1 clarity, flanked by tapered diamonds, sold for $154,800.Also selling for $154,800 was a white gold ring centered on an 8.08-carat step-cut Colombian emerald flanked by diamonds.Winston Cluster diamond earrings by Harry Winston fetched $141,900.PhillipsA pair of platinum Winston Cluster earrings by Harry Winston, each set with pear-shaped and marquise-cut diamonds totaling approximately 16.15 carats, fetched $141,900.9.30-carat paraiba tourmaline and diamond ring sold for $129,000PhillipsA white gold ring set with a 9.30-carat pear-shaped paraiba tourmaline from Mozambique and flanked by shield-shaped diamonds sold for $129,000, surpassing its estimate.A 5.29-carat D color and VS1 clarity diamond ring achieved $116,100.PhillipsA platinum ring featuring a 5.29-carat step-cut diamond graded D color and VS1 clarity between triangular-cut diamonds achieved $116,100.A De Vroomen, tourmaline, enamel and diamond pendant Brooch fetched $100,620PhillipsOne of the strongest performances of the auction came from the Tina Hills collection. An 18-karat yellow gold brooch by De Vroomen featuring a square step-cut tourmaline accented by princess-cut diamonds and basse-taille enamel sold for $100,620, nearly 20 times its high estimate. De Vroomen was founded in 1969 by husband-and-wife team Leo and Ginnie De Vroomen.Rounding out the top 10 was a platinum and yellow gold ring centered on a 6.54-carat step-cut emerald flanked by triangular-cut diamonds. It sold for $96,750.