AUCTION  / 

Genuine Fine Gems, Jewelry, and Watches

Auction CurrencyUSD Auction Location606 S Hill St. Suite 607, Los Angeles, California, 90014, United States

Auction Details

Genuine Fine Gems, Jewelry, and Watches.

All lots are brand new unless stated in the description of the item. Lots are mostly Genuine Diamonds and/or Natural Gemstones. Most lots are in stock and ready to ship. Please see descriptions for more details or you can email us at: info@lagemsanddiamonds.com for questions, please indicate lot number and auction date as your email subject.

***We require working contact number and a valid credit card for ALL Bidders before the auction starts. A non-wo
< Prev# Rows102050100Next >123. . .7891011. . .343536
 Choose Your Layout > Switch to Grid View Switch to List View
Genuine 16" 14k Gold-Yellow 0.9mm DC Snake Chain 3.5g143055027 - Genuine 16" 14k Gold-Yellow 0.9mm DC Snake Chain 3.5g
LA Gems and Diamonds
Genuine 16" 14k Gold-Yellow 0.9mm DC Snake Chain 3.5g **|**|** Chain Size: 16\" ; Metal Purity: 14kt ; Brand: Italian ; Metal: Gold-Yell...
Bidding Has Concluded
Estimate : 600.00 - 1,300.00
Sold to floor for (160.00) = 160.00
 
Details...Bookmark
Uncirculated Silver Eagle 1989143124830 - Uncirculated Silver Eagle 1989
LA Gems and Diamonds
Uncirculated Silver Eagle 1989 **|**|** Uncirculated Silver Eagle 1989 ; MSRP: $250
Bidding Has Concluded
Estimate : 170.00 - 250.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
11.55 ctw Citrine Ring .925 Sterling Silver143226740 - 11.55 ctw Citrine Ring .925 Sterling Silver
LA Gems and Diamonds
11.55 ctw Citrine Ring .925 Sterling Silver **|**|** 11.55 ctw Citrine Ring .925 Sterling Silver ; MSRP: $150
Bidding Has Concluded
Estimate : 100.00 - 150.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
30 Oz Coin Fine Silver Usa One Dollar 2011143321076 - 30 Oz Coin Fine Silver Usa One Dollar 2011
LA Gems and Diamonds
30 Oz Coin Fine Silver Usa One Dollar 2011 **|**|** 30 Oz Coin Fine Silver Usa One Dollar 2011; Count 30 Pieces ; MSRP: $4200
Bidding Has Concluded
Estimate : 2,800.00 - 4,200.00
Sold to floor for (1,200.00) = 1,200.00
 
Details...Bookmark
Gold Bars: Pamp Suisse 2.5 Gram Gold Bar143324660 - Gold Bars: Pamp Suisse 2.5 Gram Gold Bar
LA Gems and Diamonds
Gold Bars: Pamp Suisse 2.5 Gram Gold Bar **|**|** Gold Bars: Pamp Suisse 2.5 Gram Gold Bar ; MSRP: $300
Bidding Has Concluded
Estimate : 260.00 - 300.00
Sold to floor for (200.00) = 200.00
 
Details...Bookmark
Natural 374.04ctw African Emerald Emerald Cut Stone143418472 - Natural 374.04ctw African Emerald Emerald Cut Stone
LA Gems and Diamonds
Natural 374.04ctw African Emerald Emerald Cut Stone **|**|** Natural African Emerald ; CTW: 374.04 ; Emerald Cut Stone ; MSRP: $3040
Bidding Has Concluded
Estimate : 1,900.00 - 3,040.00
Sold to floor for (380.00) = 380.00
 
Details...Bookmark
GENUINE 16\" 14K ITALIAN GOLD ROPE CHAIN 30.3 gram143421158 - GENUINE 16\" 14K ITALIAN GOLD ROPE CHAIN 30.3 gram
LA Gems and Diamonds
GENUINE 16\" 14K ITALIAN GOLD ROPE CHAIN 30.3 gram **|**|** GENUINE 16" 14K ITALIAN GOLD ROPE CHAIN; WHITE OR YELLOW GOLD; D/C or REG.; 5....
Bidding Has Concluded
Estimate : 2,730.00 - 4,095.00
Sold to floor for (1,400.00) = 1,400.00
 
Details...Bookmark
10.00 CTW BLUE TOPAZ RING .925 STERLING SILVER143425317 - 10.00 CTW BLUE TOPAZ RING .925 STERLING SILVER
LA Gems and Diamonds
10.00 CTW BLUE TOPAZ RING .925 STERLING SILVER **|**|** 10.00 CTW BLUE TOPAZ RING .925 STERLING SILVER ; MSRP: $150
Bidding Has Concluded
Estimate : 120.00 - 150.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Uncirculated Mint Set 1987143426565 - Uncirculated Mint Set 1987
LA Gems and Diamonds
Uncirculated Mint Set 1987 **|**|** Uncirculated Mint Set 1987 ; MSRP: $55
Bidding Has Concluded
Estimate : 45.00 - 55.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Silver Britannia One Ounce 2011143521712 - Silver Britannia One Ounce 2011
LA Gems and Diamonds
Silver Britannia One Ounce 2011 **|**|** Silver Britannia One Ounce 2011 ; MSRP: $150
Bidding Has Concluded
Estimate : 140.00 - 150.00
Sold to floor for (85.00) = 85.00
 
Details...Bookmark
18.00 ctw BLUE TOPAZ and tourmiline Cut fine ring .925143626382 - 18.00 ctw BLUE TOPAZ and tourmiline Cut fine ring .925
LA Gems and Diamonds
18.00 ctw BLUE TOPAZ and tourmiline Cut fine ring .925 **|**|** 18.00 ctw BLUE TOPAZ and tourmiline Cut fine ring .925 STERLING SILVER ; MSRP: $675
Bidding Has Concluded
Estimate : 450.00 - 675.00
Sold to floor for (125.00) = 125.00
 
Details...Bookmark
Singapore Gold 20th Ounce 1986 Tiger143724641 - Singapore Gold 20th Ounce 1986 Tiger
LA Gems and Diamonds
Singapore Gold 20th Ounce 1986 Tiger **|**|** Singapore Gold 20th Ounce 1986 Tiger ; MSRP: $300
Bidding Has Concluded
Estimate : 260.00 - 300.00
Sold to floor for (165.00) = 165.00
 
Details...Bookmark
Natural 32.85ctw Emerald Pear Shape (10) Stone143818529 - Natural 32.85ctw Emerald Pear Shape (10) Stone
LA Gems and Diamonds
Natural 32.85ctw Emerald Pear Shape (10) Stone **|**|** ; MSRP: $400
Bidding Has Concluded
Estimate : 400.00 - 800.00
Sold to floor for (100.00) = 100.00
 
Details...Bookmark
90% Silver Proof Franklin Halves Roll (20pcs.)143824113 - 90% Silver Proof Franklin Halves Roll (20pcs.)
LA Gems and Diamonds
90% Silver Proof Franklin Halves Roll (20pcs.) **|**|** 90% Silver Proof Franklin Halves Roll (20pcs.) ; MSRP: $465
Bidding Has Concluded
Estimate : 425.00 - 465.00
Sold to floor for (375.00) = 375.00
 
Details...Bookmark
Uncirculated Mint Set 1986143824794 - Uncirculated Mint Set 1986
LA Gems and Diamonds
Uncirculated Mint Set 1986 **|**|** Uncirculated Mint Set 1986 ; MSRP: $225
Bidding Has Concluded
Estimate : 145.00 - 225.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
BLUE TURQUOISE ROUND CZ NECKLACE; STONE-BLUE TURQUOISE;143826117 - BLUE TURQUOISE ROUND CZ NECKLACE; STONE-BLUE TURQUOISE;
LA Gems and Diamonds
BLUE TURQUOISE ROUND CZ NECKLACE; STONE-BLUE TURQUOISE; **|**|** BLUE TURQUOISE ROUND CZ NECKLACE; STONE-BLUE TURQUOISE; METAL-SILVER ; MSRP: $300
Bidding Has Concluded
Estimate : 100.00 - 300.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
EGL CERT. DIAMOND CUSHION 1.02 CTW G/VVS2143826521 - EGL CERT. DIAMOND CUSHION 1.02 CTW G/VVS2
LA Gems and Diamonds
EGL CERT. DIAMOND CUSHION 1.02 CTW G/VVS2 **|**|** EGL CERT. DIAMOND CUSHION 1.02 CTW G/VVS2 5.70X5.43X3.75 CUT: POLISH:EX SYMM:EX DEPTH:69.1% TABLE:6
Bidding Has Concluded
Estimate : 11,912.00 - 14,890.00
Sold to floor for (4,800.00) = 4,800.00
 
Details...Bookmark
Genuine 16" 14k Gold-Yellow 5.1mm Rhod Figaro Chain143855091 - Genuine 16" 14k Gold-Yellow 5.1mm Rhod Figaro Chain
LA Gems and Diamonds
Genuine 16" 14k Gold-Yellow 5.1mm Rhod Figaro Chain **|**|** Chain Size: 16\" ; Metal Purity: 14kt ; Brand: Italian ; Metal: Gold-Yellow ...
Bidding Has Concluded
Estimate : 3,000.00 - 7,000.00
Sold to floor for (860.00) = 860.00
 
Details...Bookmark
Gold Bars: Pamp Suisse One Ounce Gold Bar 2012 (Dragon143924658 - Gold Bars: Pamp Suisse One Ounce Gold Bar 2012 (Dragon
LA Gems and Diamonds
Gold Bars: Pamp Suisse One Ounce Gold Bar 2012 (Dragon **|**|** Gold Bars: Pamp Suisse One Ounce Gold Bar 2012 (Dragon Design) ; MSRP: $2000
Bidding Has Concluded
Estimate : 1,960.00 - 2,000.00
Sold to floor for (1,900.00) = 1,900.00
 
Details...Bookmark
US Proof Set 2006143926270 - US Proof Set 2006
LA Gems and Diamonds
US Proof Set 2006 **|**|** US Proof Set 2006 ; MSRP: $50
Bidding Has Concluded
Estimate : 40.00 - 50.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
11.05 ctw Garnet Ring .925 Sterling Silver144026729 - 11.05 ctw Garnet Ring .925 Sterling Silver
LA Gems and Diamonds
11.05 ctw Garnet Ring .925 Sterling Silver **|**|** 11.05 ctw Garnet Ring .925 Sterling Silver ; MSRP: $150
Bidding Has Concluded
Estimate : 100.00 - 150.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
LINCONL CENT G-VG 1910144125522 - LINCONL CENT G-VG 1910
LA Gems and Diamonds
LINCONL CENT G-VG 1910 **|**|** LINCONL CENT G-VG 1910 ; MSRP: $20
Bidding Has Concluded
Estimate : 15.00 - 20.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Natural 2.72ctw Emerald Oval Stone144218390 - Natural 2.72ctw Emerald Oval Stone
LA Gems and Diamonds
Natural 2.72ctw Emerald Oval Stone **|**|** Natural Emerald ; Oval Stone ; CTW: 2.72 ; MSRP: $200
Bidding Has Concluded
Estimate : 200.00 - 400.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
83.50 CTW STAR RUBY NECKLACE .925 STERLING SILVER144225394 - 83.50 CTW STAR RUBY NECKLACE .925 STERLING SILVER
LA Gems and Diamonds
83.50 CTW STAR RUBY NECKLACE .925 STERLING SILVER **|**|** 83.50 CTW STAR RUBY NECKLACE .925 STERLING SILVER ; MSRP: $600
Bidding Has Concluded
Estimate : 400.00 - 600.00
Sold to floor for (200.00) = 200.00
 
Details...Bookmark
GENUINE 14K ITALIAN YELLOW GOLD 3.39G HAND MADE CHAIN144226462 - GENUINE 14K ITALIAN YELLOW GOLD 3.39G HAND MADE CHAIN
LA Gems and Diamonds
GENUINE 14K ITALIAN YELLOW GOLD 3.39G HAND MADE CHAIN **|**|** GENUINE 14K ITALIAN YELLOW GOLD 3.39G HAND MADE CHAIN YELLOW METAL PURITY 14K ITALIAN T
Bidding Has Concluded
Estimate : 185.00 - 205.00
Sold to floor for (155.00) = 155.00
 
Details...Bookmark
Uncirculated Mint Set 1962144226586 - Uncirculated Mint Set 1962
LA Gems and Diamonds
Uncirculated Mint Set 1962 **|**|** Uncirculated Mint Set 1962 ; MSRP: $105
Bidding Has Concluded
Estimate : 95.00 - 105.00
Sold to floor for (75.00) = 75.00
 
Details...Bookmark
0.50 ct Round cut Diamond Solitaire Ring, G-H, I144285011 - 0.50 ct Round cut Diamond Solitaire Ring, G-H, I
LA Gems and Diamonds
0.50 ct Round cut Diamond Solitaire Ring, G-H, I **|**|** Diamond count: 1 ROUND CUT ; Diamond weight: 0.5ctw Diamond color: G-H ; Diamond clarity: I
Bidding Has Concluded
Estimate : 1,503.00 - 3,238.00
Sold to floor for (450.00) = 450.00
 
Details...Bookmark
Certified US Gold $5 Liberty MS62144321888 - Certified US Gold $5 Liberty MS62
LA Gems and Diamonds
Certified US Gold $5 Liberty MS62 **|**|** Certified US Gold $5 Liberty MS62 ; MSRP: $800
Bidding Has Concluded
Estimate : 750.00 - 800.00
Sold to floor for (750.00) = 750.00
 
Details...Bookmark
Natural Sapphire 63.55ctw Oval Necklace .925 Sterling144415735 - Natural Sapphire 63.55ctw Oval Necklace .925 Sterling
LA Gems and Diamonds
Natural Sapphire 63.55ctw Oval Necklace .925 Sterling **|**|** Natural Sapphire 63.55ctw Oval Necklace .925 Sterling Silver ; MSRP: $13542
Bidding Has Concluded
Estimate : 13,542.00 - 23,699.00
Sold to floor for (850.00) = 850.00
 
Details...Bookmark
CHAMPAGNE PEARL ROUND CZ RING; AUTHENTIC PHILIPPINE PEA144426091 - CHAMPAGNE PEARL ROUND CZ RING; AUTHENTIC PHILIPPINE PEA
LA Gems and Diamonds
CHAMPAGNE PEARL ROUND CZ RING; AUTHENTIC PHILIPPINE PEA **|**|** CHAMPAGNE PEARL ROUND CZ RING; AUTHENTIC PHILIPPINE PEARL; METAL-SILVER; SIZE - 7 ; M
Bidding Has Concluded
Estimate : 100.00 - 300.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Gold Bars: Pamp Suisse 10 Gram Gold Bar144521753 - Gold Bars: Pamp Suisse 10 Gram Gold Bar
LA Gems and Diamonds
Gold Bars: Pamp Suisse 10 Gram Gold Bar **|**|** Gold Bars: Pamp Suisse 10 Gram Gold Bar ; MSRP: $650
Bidding Has Concluded
Estimate : 640.00 - 650.00
Sold to floor for (655.00) = 655.00
 
Details...Bookmark
Australian Lunar Gold Twentieth Ounce Gold 2001 Snake144521768 - Australian Lunar Gold Twentieth Ounce Gold 2001 Snake
LA Gems and Diamonds
Australian Lunar Gold Twentieth Ounce Gold 2001 Snake **|**|** Australian Lunar Gold Twentieth Ounce Gold 2001 Snake ; MSRP: $205
Bidding Has Concluded
Estimate : 195.00 - 205.00
Sold to floor for (175.00) = 175.00
 
Details...Bookmark
Natural 22.45ctw Emerald Emerald Cut (3) Stone144618513 - Natural 22.45ctw Emerald Emerald Cut (3) Stone
LA Gems and Diamonds
Natural 22.45ctw Emerald Emerald Cut (3) Stone **|**|** ; MSRP: $400
Bidding Has Concluded
Estimate : 400.00 - 800.00
Sold to floor for (100.00) = 100.00
 
Details...Bookmark
2004 1/4 oz Gold Year of the Monkey Lunar Coin (Series144624048 - 2004 1/4 oz Gold Year of the Monkey Lunar Coin (Series
LA Gems and Diamonds
2004 1/4 oz Gold Year of the Monkey Lunar Coin (Series **|**|** 2004 1/4 oz Gold Year of the Monkey Lunar Coin (Series 1) ; MSRP: $785
Bidding Has Concluded
Estimate : 775.00 - 785.00
Sold to floor for (600.00) = 600.00
 
Details...Bookmark
90% Silver Kennedy Halves 100 pcs.144624975 - 90% Silver Kennedy Halves 100 pcs.
LA Gems and Diamonds
90% Silver Kennedy Halves 100 pcs. **|**|** 90% Silver Kennedy Halves 100 pcs. ; MSRP: $1450
Bidding Has Concluded
Estimate : 1,390.00 - 1,450.00
Sold to floor for (1,300.00) = 1,300.00
 
Details...Bookmark
EGL CERT. DIAMOND CUSHION 1.06 CTW H/VS1144626508 - EGL CERT. DIAMOND CUSHION 1.06 CTW H/VS1
LA Gems and Diamonds
EGL CERT. DIAMOND CUSHION 1.06 CTW H/VS1 **|**|** EGL CERT. DIAMOND CUSHION 1.06 CTW H/VS1 6.56X5.75X3.67 CUT: POLISH:EX SYMM:EX DEPTH:63.9% TABLE:63%
Bidding Has Concluded
Estimate : 11,872.00 - 14,840.00
Sold to floor for (6,300.00) = 6,300.00
 
Details...Bookmark
17.45 CTW Garnet Ring .925 Sterling Silver144626694 - 17.45 CTW Garnet Ring .925 Sterling Silver
LA Gems and Diamonds
17.45 CTW Garnet Ring .925 Sterling Silver **|**|** 17.45 CTW Garnet Ring .925 Sterling Silver ; MSRP: $210
Bidding Has Concluded
Estimate : 140.00 - 210.00
Sold to floor for (70.00) = 70.00
 
Details...Bookmark
Genuine 16" 14k Gold-Yellow 1.5mm Wheat Chain 4.8g144655037 - Genuine 16" 14k Gold-Yellow 1.5mm Wheat Chain 4.8g
LA Gems and Diamonds
Genuine 16" 14k Gold-Yellow 1.5mm Wheat Chain 4.8g **|**|** Chain Size: 16\" ; Metal Purity: 14kt ; Brand: Italian ; Metal: Gold-Yellow ...
Bidding Has Concluded
Estimate : 700.00 - 1,700.00
Sold to floor for (220.00) = 220.00
 
Details...Bookmark
Australian Kookaburra Kilo Silver 2012144721911 - Australian Kookaburra Kilo Silver 2012
LA Gems and Diamonds
Australian Kookaburra Kilo Silver 2012 **|**|** Australian Kookaburra Kilo Silver 2012 ; MSRP: $1200
Bidding Has Concluded
Estimate : 1,150.00 - 1,200.00
Sold to floor for (1,425.00) = 1,425.00
 
Details...Bookmark
15.75 ctw Blue Topaz Ring .925 Sterling Silver144826733 - 15.75 ctw Blue Topaz Ring .925 Sterling Silver
LA Gems and Diamonds
15.75 ctw Blue Topaz Ring .925 Sterling Silver **|**|** 15.75 ctw Blue Topaz Ring .925 Sterling Silver ; MSRP: $150
Bidding Has Concluded
Estimate : 100.00 - 150.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Prussia, 2 mark, 1891-1912, VF (KM522)144926888 - Prussia, 2 mark, 1891-1912, VF (KM522)
LA Gems and Diamonds
Prussia, 2 mark, 1891-1912, VF (KM522) **|**|** Prussia, 2 mark, 1891-1912, VF (KM522) ; MSRP: $85
Bidding Has Concluded
Estimate : 65.00 - 85.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Natural 2.57ctw Emerald Oval Cut Stone145018308 - Natural 2.57ctw Emerald Oval Cut Stone
LA Gems and Diamonds
Natural 2.57ctw Emerald Oval Cut Stone **|**|** Natural Emerald ; Oval Cut Stone ; CTW: 2.57 ; MSRP: $200
Bidding Has Concluded
Estimate : 200.00 - 400.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Uncirculated Mint Set 2004145024295 - Uncirculated Mint Set 2004
LA Gems and Diamonds
Uncirculated Mint Set 2004 **|**|** Uncirculated Mint Set 2004 ; MSRP: $60
Bidding Has Concluded
Estimate : 50.00 - 60.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
25.75 ctw,SEMIPRECIOUS RING .925 STERLING SILVER145026015 - 25.75 ctw,SEMIPRECIOUS RING .925 STERLING SILVER
LA Gems and Diamonds
25.75 ctw,SEMIPRECIOUS RING .925 STERLING SILVER **|**|** 25.75 ctw,SEMIPRECIOUS RING .925 STERLING SILVER ; MSRP: $600
Bidding Has Concluded
Estimate : 400.00 - 600.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
GENUINE 14K ITALIAN WHITE/YELLOW GOLD 2.17G D/C BEAD 1+145026436 - GENUINE 14K ITALIAN WHITE/YELLOW GOLD 2.17G D/C BEAD 1+
LA Gems and Diamonds
GENUINE 14K ITALIAN WHITE/YELLOW GOLD 2.17G D/C BEAD 1+ **|**|** GENUINE 14K ITALIAN WHITE/YELLOW GOLD 2.17G D/C BEAD 1+1 WHITE/YELLOW MEATL PURITY 14
Bidding Has Concluded
Estimate : 130.00 - 150.00
Sold to floor for (100.00) = 100.00
 
Details...Bookmark
Uncirculated Mint Set 1989145124310 - Uncirculated Mint Set 1989
LA Gems and Diamonds
Uncirculated Mint Set 1989 **|**|** Uncirculated Mint Set 1989 ; MSRP: $60
Bidding Has Concluded
Estimate : 50.00 - 60.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
Gold Bars: Perth Mint 10 Gram Gold Bar145125464 - Gold Bars: Perth Mint 10 Gram Gold Bar
LA Gems and Diamonds
Gold Bars: Perth Mint 10 Gram Gold Bar **|**|** Gold Bars: Perth Mint 10 Gram Gold Bar ; MSRP: $1650
Bidding Has Concluded
Estimate : 1,270.00 - 1,650.00
Sold to floor for (650.00) = 650.00
 
Details...Bookmark
26.65 ctw Multi color Ring .925 Sterling Silver145226786 - 26.65 ctw Multi color Ring .925 Sterling Silver
LA Gems and Diamonds
26.65 ctw Multi color Ring .925 Sterling Silver **|**|** 26.65 ctw Multi color Ring .925 Sterling Silver ; MSRP: $135
Bidding Has Concluded
Estimate : 90.00 - 135.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark
UK Britannia Quarter Ounce (dates our choice)145324680 - UK Britannia Quarter Ounce (dates our choice)
LA Gems and Diamonds
UK Britannia Quarter Ounce (dates our choice) **|**|** UK Britannia Quarter Ounce (dates our choice) ; MSRP: $700
Bidding Has Concluded
Estimate : 660.00 - 700.00
Sold to floor for (600.00) = 600.00
 
Details...Bookmark
Natural 2.32ctw Emerald Oval Cut Stone145418206 - Natural 2.32ctw Emerald Oval Cut Stone
LA Gems and Diamonds
Natural 2.32ctw Emerald Oval Cut Stone **|**|** Natural Emerald ; Oval Cut Stone ; CTW: 2.32 ; MSRP: $200
Bidding Has Concluded
Estimate : 200.00 - 400.00
Sold to floor for (50.00) = 50.00
 
Details...Bookmark