天然サファイアと宝石の購入ガイド

What a Good 2 Carat Sapphire Costs

Cost of a 2 Carat Sapphire — What Drives the Price and What Your Budget Buys

What a 2 carat sapphire costs, measured from the stones we list at 2.00 carats and above on 15 November 2026: listed prices by color and treatment, the millimetre sizes recorded on each stone's report, and why per-carat price tracks color and treatment more closely than it tracks the 2-carat mark.

もっと読むCost of a 2 Carat Sapphire — What Drives the Price and What Your Budget Buysについて

Cost of 1 carat Sapphire

Cost of 1 carat Sapphire — Honest Pricing

Wondering about the cost of 1 carat Sapphire? This guide gives our own listed prices, as listed on 15 November 2026, with the number of stones behind every figure — and it says plainly which figures we will not publish, and why.

もっと読むCost of 1 carat Sapphire — Honest Pricingについて

Teal Sapphire Price Guide

ティールサファイアの価格｜1ctあたりの単価と、価格差が生まれる理由

当店が在庫するティールサファイアの掲載価格を、石ごとに1ctあたりの単価を添えてまとめました。2026年11月15日時点の当店自身の掲載内容から、在庫7石、1ctあたり900ドルから1,400ドル。ティールは当店の取引語であり、ラボの用語ではありません。

もっと読むティールサファイアの価格｜1ctあたりの単価と、価格差が生まれる理由について

Padparadscha Sapphire Price Guide

Padparadscha Sapphire Price Guide — What They Cost and Why

Padparadscha Sapphire Price Guide 2026: Learn what natural GIA-documented Padparadscha sapphires cost by carat, origin, quality, and treatment, with expert buying advice.

もっと読むPadparadscha Sapphire Price Guide — What They Cost and Whyについて

Low-profile sapphire ring, stone set close to the finger

Best Sapphire Cuts for Low-Profile Rings — How Shape and Depth Affect Setting Height

Which natural sapphire cuts sit lowest in a ring, how cut depth sets the height of the finished ring, and what the sapphires we list actually measure.

もっと読むBest Sapphire Cuts for Low-Profile Rings — How Shape and Depth Affect Setting Heightについて

Best Elongated Sapphire Shapes for Engagement Rings

Best Elongated Sapphire Shapes for Engagement Rings — Which Cuts Create the Most Finger-Lengthening Effect

Which elongated sapphire shapes create the most dramatic finger-lengthening effect in engagement rings: oval, pear, marquise, and emerald cut compared — length-to-width ratios, what each looks like on the hand, and how to choose the right elongated shape for your finger type.

もっと読むBest Elongated Sapphire Shapes for Engagement Rings — Which Cuts Create the Most Finger-Lengthening Effectについて

How to Choose a Sapphire for a Bezel Ring

How to Choose a Sapphire for a Bezel Ring — What Works and What to Look For

How to choose a sapphire for a bezel engagement ring: which shapes suit bezel settings, how the bezel affects apparent size and color, what quality standards matter more or less in a bezel, and how to evaluate a stone specifically for this modern, protective setting style.

もっと読むHow to Choose a Sapphire for a Bezel Ring — What Works and What to Look Forについて

How to Choose a Setting That Protects Sapphire Corners

How to Choose a Setting That Protects Sapphire Corners — Prong Placement and Setting Styles

How to protect the vulnerable corners and points of fancy-shaped sapphires through correct prong placement, V-prong tips, and setting styles — which shapes are most at risk, what corner damage looks like, and how to choose the right setting for long-term safety.

もっと読むHow to Choose a Setting That Protects Sapphire Corners — Prong Placement and Setting Stylesについて

How to Design a Custom Sapphire Ring from a Loose Stone

How to Design a Custom Sapphire Ring from a Loose Stone — The Complete Process

How to turn a loose Ceylon sapphire into a finished custom ring: the step-by-step process from choosing your stone to final delivery — how to brief a jeweler, what decisions to make in sequence, how to evaluate CAD renders, and what the process costs and takes.

もっと読むHow to Design a Custom Sapphire Ring from a Loose Stone — The Complete Processについて

Yellow Gold vs. White Gold vs. Platinum for Sapphire Rings

Yellow Gold vs. White Gold vs. Platinum for Sapphire Rings — The Full Comparison

Yellow gold vs. white gold vs. platinum for sapphire engagement rings: how they differ in durability, maintenance, cost, and how each metal interacts with sapphire colors — a complete comparison to help you choose the right metal for your specific stone and lifestyle.

もっと読むYellow Gold vs. White Gold vs. Platinum for Sapphire Rings — The Full Comparisonについて

How to Choose Metal Color for a Sapphire Ring

How to Choose Metal Color for a Sapphire Ring — What Works with Which Sapphire

How to choose the right metal color for a sapphire engagement ring: how yellow gold, white gold, platinum, and rose gold each affect sapphire color appearance, which metals suit which sapphire colors, and how skin tone interacts with metal choice.

もっと読むHow to Choose Metal Color for a Sapphire Ring — What Works with Which Sapphireについて

How to Choose Side Stones for a Sapphire Ring

How to Choose Side Stones for a Sapphire Ring — Shape, Color, and Material Decisions

How to choose the right side stones for a sapphire engagement ring: diamond vs. sapphire side stones, shape combinations that work, size proportioning, color matching and contrast, and how each choice changes the visual character of the finished ring.

もっと読むHow to Choose Side Stones for a Sapphire Ring — Shape, Color, and Material Decisionsについて

Crescent Gemsが選ばれる理由


婚約指輪や大切なジュエリーのための宝石選びは、とても個人的な決断です。一生のうちに数えるほどしかない特別なお買い物だからこそ、信頼できること、正確な情報、そして専門的なアドバイスが大切になります。Crescent Gemsは、25年以上にわたる宝石の経験に、産地からの直接仕入れ、丁寧なカット、処理についての透明な情報開示を組み合わせ、安心してお選びいただけるようお手伝いします。

天然の採掘石のみを取り扱っています

主要産地からの直接仕入れ

合成石、フラックス含浸処理石、ベリリウム拡散処理石は扱いません

自社工房でのカット・リカット

日本への配送対応｜FedEx・UPSによる追跡可能な国際配送

実物写真、手に取った動画、360度ビュー

14日間の返品受付

表示価格に日本の輸入消費税は含まれていません

主要な宝石にはGIAレポート付き

ご希望の石の個別動画をお送りします

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